Edward Pigot Seismic Observatory

This page records incidental seismic observations logged at EPSO. Overseas, Australian, and Local events are logged on separate pages.

Date	Time (UTC)	What	Summary Seismogram	PSN data file	Media
2018-08-16	18:21:30	An Mw=6.0 earthquake in the Volcano Islands (Japan region) was followed 82 seconds later by another quake of Mw = 6.4. This double earthquake occurring in the same location had the visual appearance on EPSO's traces, of a NSW regional earthquake, with an 82 second delay between P and S phases.	S6000 triaxial EPSO Array	psn psn
2018-03-08	10:42:43	A double earthquake in the immediate vicinity of the Cadia gold mine, with two (1, 2) ML=2.7 quakes located in the same area separated by 10 seconds.	S6000 triaxial EPSO Array	psn psn	1, 2
2018-02-28	02:30	A roadworking vibrating roller which was operating between 100-1000m from our house, caused the whole house to noticeably vibrate. The primary vibration detected on EPSO Array shows a fairly monochromatic frequency of ~29Hz, which excited various sympathetic modes of vibration in our house.	EPSO Array	psn
2017-10-26	08:30	An exceptionally intense wind storm that abruptly arrived from nowhere and lasted for around 15-20 minutes. Large transient spikes on the traces were from a number of nearby large trees toppling.	S6000 triaxial EPSO Array	psn psn
2017-10-22	04:28:50	A horse walking nearby an EPSO Array sensor. A visiting horse strolled past an EPSO Array sensor and the characteristic seismic noise was recorded. Because of a walking horse's step-pattern the resultant seismic waveform looks a little muddled, but frequency analysis shows a sharp peak amplitude of around 1.65Hz, implying a footstep every 0.6 seconds, implying each leg of the horse stepping with a period of around 2.4 seconds.	EPSO Array	psn
2017-09-03	03:30:05	North Korean underground nuclear explosion from the Punggye-ri Nuclear Test Site, located 8300km north of EPSO. This event was similar to earlier events recorded in 2016 but of much larger amplitude. A detailed description of EPSO's observations are recorded on a separate page.
2017-07-20	02:49:00	Heavy plant operating around 1km due west of us.	EPSO Array	psn
2017-02-26	21:10:00	Often at around 7-8am local time, EPSO records a local noise starts which persists for an hour or two, the source of which is heavy equipment operating at our town's dump located ≈3km away. Attached is a 20 minute example of the noise recorded by EPSO Array, generated by a D7 bulldozer chewing into sandstone rock at a range and heading of 3.3km and 72º. The noise has a fairly sharp spectral peak of around 7Hz.	EPSO Array	psn
2016-11-13 2016-11-14 2016-11-15	11:32:09 11:52:47 13:21:13 13:31:30 18:59:07 22:19:32 00:34:23 06:47:54 07:21:05 17:30:33	Following the M7.9 quake below, there were numerous large aftershocks located in the north-eastern region of the South Island of New Zealand, and many of these quakes transmitted hydroacoustic T-phase waves into the Tasman Sea. T-phase producing quakes varied in size between M5.2 to M6.2, and what this earthquake sequence has demonstrated is that any land based earthquake occurring in New Zealand's South Island with a magnitude of ≈5.2 or greater, is likely to generate a T-phase into the Tasman Sea, which then arrives in south eastern Australia around 20-25 minutes later. The psn files shown to the right are all of 30 minutes duration and have been band-pass filtered between 1-4Hz.	S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial S6000 triaxial	psn psn psn psn psn psn psn psn psn psn
2016-11-13	11:03:01	A T-phase event from a Mwp=7.9 earthquake located on the east coast of the South Island of New Zealand, Extraordinarily, the quake that caused it was located on land on the eastern side of New Zealand , around 140km from the nearest western coastline. Further details at EPSO's T-phase log for 2016-11-13.	VM hor acceln VM hor velocity EPSO Array	psn psn psn
2016-10-27	03:38:47	Quarry blast at the nearby Warrumbungle Shire Council blue-metal rock quarry. Initial frequencies peaked at around 18Hz, which after a few seconds gave way to surface waves of 2-3Hz. This may be compared with an earlier blast at the quarry that occurred on 2014-11-06.	S6000 triaxial EPSO_Array	psn psn
2016-09-09	00:30:01	North Korean underground nuclear explosion from the Punggye-ri Nuclear Test Site, located 8300km north of EPSO. The seismic signal was weak (peak vertical ground speed < 1µm/s) but clear, being the first few cycles of the initial P-phase. A separate web page gives a more detailed account of the observations at EPSO, and from elsewhere.	S6000 triaxial EPSO_Array Willmore Z	psn psn psn
2016-01-06	01:30:01	North Korean underground nuclear explosion from the Punggye-ri Nuclear Test Site, located 8300km north of EPSO. The seismic signal was weak (peak vertical ground speed < 1µm/s) but clear, being the first few cycles of the initial P-phase. A separate web page gives a more detailed account of the observations at EPSO, and from elsewhere.	S6000 triaxial EPSO_Array	psn psn
2015-12-20	10:21:21	We are surrounded by a forest largely comprised of the tree species Eucalyptus Rossii, known locally as 'scribbly gums'. This species has a notorious tendency to randomly drop large branches, also giving it the generic title of 'widow maker'. We occasionally hear loud crashes in the distance caused by falling timber, particularly during times when the trees are stressed by drought. These events generally record well on EPSO Array, such as with the example shown (located somewhere in our north-east sector). These data also address the age old philosophical question "If a tree falls in a forest and no one is around to hear it, does it make a sound?" The answer is, "you bet it does!"	EPSO Array	psn
2015-10-19	22:05:00	A series of pulses spaced every ≈3.7s, lasting for around 6 minutes, with this grouping repeated several times during the daylit hours. The source is very likely a tractor-mounted machine which rams fence-posts into the ground by repeatedly striking them with a heavy weight.. Analysis of the EPSO Array data showed a source direction of 188° and an apparent velocity across the array of 1.0km/s (this low seismic velocity is typical of surface waves from very nearby sources). The peak spectral energy was at a frequency of ≈15Hz which is also typical of very local events.	S6000 triaxial EPSO Array	psn psn
2015-03-12	22:51:42	Large tree branch collapse located immediately north of EPSO Array (-31.25841, 149.21993)	S6000 triaxial EPSO Array	psn psn
2015-02-25	12:29:55	Another seismic T-phase from a M4.8 earthquake in New Zealand, with the Geonet epicentre location around 75km west of Te Anau. More details from the EPSO T-Phase log.	S6000 triaxial EPSO Array	psn psn
2015-01-13	11:40:01	Another seismic T-phase from a M5.5 earthquake in New Zealand, with the Geonet epicentre location around 25km inland from the open ocean. More details at the EPSO T-Phase log.	EPSO Array	psn
2015-01-05	17:48:41	Yet another seismic T-phase associated with an earthquake from the southern New Zealand region, but this time from an event located inland about 40km from the nearest coast. More details at the EPSO T-Phase log.	VM hor acceln VM hor velocity S6000 triaxial EPSO Array	psn psn psn psn
2014-12-31	02:20:00	A strange looking pulsing visible on the 24h summary traces, starting at around 02:10UTC (13:10EDT) and lasting for about an hour. The pulsing pattern repeats every 60 seconds or so. Analysis by EPSO Array shows a very consistent apparent bearing to the noise, of 56°, with V_app = 1.2km/s, and a peak frequency of 6.2Hz, with half-power bandwidth of around 0.4Hz. The apparent speed and direction are consistent with operation of heavy equipment 'out in the scrub' within a few kilometres distance.	S6000 triaxial EPSO Array	psn psn
2014-12-12	08:02:07	Yet another seismic T-phase has arrived from our local T-phase 'nursery' located SW of the South Island of New Zealand. USGS reported an event had occurred at 08:02:07, located at -46.963, 165.832 and although no usual seismic phases were detected at EPSO, around 22 minutes after the event (≈08:24:05) an apparent T-wave arrived. A quick check of the relevant EPSO Array data showed the arrival direction of these waves was almost identical to the event recorded on 2014-12-01 described immediately below.	S6000 triaxial EPSO Array	psn psn
2014-12-01	13:04:27	A seismic T-phase from an undersea earthquake located in the Auckland Islands Region of New Zealand. This T-phase event was very similar to another which occurred in the same area around a year earlier, but this latest event was recorded by EPSO Array and apparent arrival angles of various earthquake waves may now be estimated. There has been some speculation that the T-waves may preferentially originate from particularly steep sections of the Australian continental shelf, where the ocean sound waves are more efficiently converted to a seismic P-wave in the crust. Thus T-waves may arrive in somewhat different directions from the usual P and S phases. However, for this particular event the P-phase and T-phase had identical apparent arrival directions, suggesting that the conversion from ocean-acoustic to seismic-P occurred at the coast somewhere along the great circle track between EPSO and the earthquake. Inspection of an undersea map of this coastal area shows that the continental shelf is relatively steep and oriented approximately perpendicular to the earthquake's great circle track, so it is perhaps not so surprising that the P and T waves recorded by EPSO Array had very similar arrival directions.	VM hor acceln VM hor velocity S6000 triaxial EPSO Array	psn psn psn psn
2014-11-06	04:12:34	Quarry blast at the nearby Warrumbungle Shire Council blue-metal rock quarry. Initial frequencies peaked at around 18Hz, which after a few seconds gave way to surface waves of 2-3Hz.	S6000 triaxial EPSO Array	psn psn
2014-10-11	03:20:00	A thunderclap from a nearby 'sneaky' thunderstorm cloud caught me by surprise. The associated lightning bolt was observed to occur in a WNW direction at an elevation of around 30° (i.e. worryingly close). Analysis of this seismic 'event' from EPSO Array indicated a source direction that agreed nicely with what was observed visually (calculated source direction = 277°). Moreover the apparent velocity of the wave front across the array was estimated at around 500m/s which is what would be expected from sonic plane wave fronts traveling at the speed of sound in air when impacting the ground at an elevation of about 30°. Curiously, the township of Coonabarabran and surrounding districts were rocked by a loud unexplained acoustical rumbling in 1896. Should such an event occur again a precise source direction, and perhaps also an elevation, may be determined.	S6000 triaxial EPSO Array	psn psn
2014-07-08	02:07:36	A mining blast from either Boggabri or Tarrawonga open cut coal mines, located around 130km ENE of EPSO. What is unusual about this particular blast event is the conspicuous arrival of what appear to be Rayleigh waves following the initial P and S arrivals. This effect is most evident in the EPSO Array data which was generated by vertically oriented geophones whose natural period is around one second. The peak spectral amplitude during P-phase arrival was around 10Hz and S-phase around 2Hz. The frequency of the Rayleigh waves (if that's what they were) was around 0.63Hz.	S6000 triaxial EPSO Array	psn psn
2013-12-16	12:07:27	A Mb=5.3 earthquake located off the West Coast of the South Island of New Zealand generated a conspicuous T-wave, with the T-wave arriving at EPSO around 16.3 minutes following the initial P-Wave (a very similar event occurred at 2012-03-14 19:07:44UTC - see below for details). For the first time such an event was also captured by the EPSO Array and served as a good system test. The initial deep Earth P-waves from this event passed the EPSO Array with an apparent horizontal velocity of ≈13km/s, implying that the true wave fronts impacted the array from the deep Earth with an inclination angle of ≈60º with respect to the EPSO Array ground surface. The later T-wave originated somewhere near the Australian continental shelf, at a distance of ≈400km. The T-wave passed over the EPSO Array with an apparent horizontal velocity of ≈8km/s, implying that the true wave front had an inclination angle of around 40º, as one might expect from a much closer event.	VM hor acceln S6000 triaxial SS-1 vertical EPSO Array	psn psn psn psn
2013-08-28	04:03:23	A routine mining roof collapse from bord-and-pillar mining (also known as room-and-pillar mining). Mining collapses are commonly recorded at EPSO, but what makes this particular event interesting is that the precise mine whereabouts and scale of the collapse were known in some detail. The geographic distance to the mine site is ≈285km from EPSO, but the S-P analysis indicates a 250km range, so in this case WinQuake's velocity tables for NSW regional quakes (at depth=0) are underestimating the true range by ≈12%. The collapsed mine roof had and estimated area of 5200m², located at a depth of ≈100m, which dropped by a distance of ≈2.5m. So assuming the overburden rock (a mixture of shale and sand) had a specific gravity ρ≈2.2 then the total mass of the body that dropped was around 1.1×10⁶ tonnes, or 1.1×10⁹ kg, and for this mass to drop 2.5m would release around 2.9×10¹⁰ Joules of energy. Using the formula relating earthquake magnitude 'M' to energy released 'E', where E≈6.3×10⁴×10^3M/2 , and for EPSO's Richter [Local] Magnitude estimate of the event of M_L=2.9, the energy released by the event was around 1.4×10⁹ Joules. This figure is ≈4.9% of the preceding estimate so it seems likely that figures for the mine roof area and the size of the vertical drop were somewhat overestimated, and/or the roof did not fall as one solid lump. But the biggest unknown in these calculations, is how much mechanical energy from the rock fall actually gets transferred into seismic waves, and doesn't simply get transferred into heat by the fracturing of rock. The above calculation suggests this figure might be around 5%, although a small variation in estimated M_L could have a large bearing on this figure.	S6000 triaxial	psn
2013-05-27	01:11:56	A presumed mining blast where the maximum amplitude of the vertical component of the P-wave was around 3× that of the S-wave. Typically, as one may observe when browsing the codas of EPSO logged mining blasts, the peak amplitude of the vertical component of the P-wave is ≈0.5-1× that of the S, making this particular event rather unusual. Similar observations of the vertical component amplitude were recorded by a Sydney station.	S6000 triaxial Sydney vertical	psn psn
2012-12-21	15:26:21.8	A doublet earthquake, with a ML=1.9 earthquake (OT≈15:25:31) followed ≈51seconds later by a ML=2.9 event. The larger event was located by the ASC with OT=2012-12-21 15:26:21.8 (±3s)‚ position= -32.49±0.08°, 152.02±0.21°, depth=14±11km, around 20km SW of the township of Buledelah, NSW. The position calculation utilised data from seismic stations DUNG, REDH, EPSO, MGCD and RNDA. A similar doublet occurred with the Lake Keepit quakes, on 2012-06-08.	S6000 triaxial SS-1 vertical	psn psn
2012-06-25	05:30:34	Peculiar looking seismic coda, from two closely located and co-timed mine blasts (from Wilpinjong & Ulan Colliery). The superposition of seismic phases produces a misleading S-P arrival which initially indicated a range (to me at least) of 76km, whereas the mines are actually located at distances of 121 and 135km from EPSO.	S6000 triaxial SS-1 vertical	psn psn
2012-06-22	09:16:04	The largest earthquake measured in Victoria for many years, occurring nearby the Gippsland township of Moe, estimated at ML=5.4 by Geoscience Australia and one of the 12 strongest ever recorded in Victoria. It was widely felt in Victoria and southern NSW, and reported internationally. The epicentre was located around 16km from a large open-cut coal mine and associated power station.	VM hor acceln VM hor velocity FBV Z velocity S6000 triaxial SS-1 vertical	psn psn psn psn psn
2012-06-08	11:31:05	A large local event (ML≈4.8) occurred ≈130km from EPSO, nearby Lake Keepit, a 425 gigalitre man-made reservoir created by Keepit Dam. This event was followed 98 seconds later by a ML≈4.6 event at the same location. The earthquakes were felt strongly in the NSW towns of Gunnedah and Tamworth, with some minor damage reported. Reports of shaking were widely recorded in the region, and it was felt in our local township of Coonabarabran (130km distant from the epicentre) where it was reported in the Coonabarabran Times newspaper. Geoscience Australia maintain a publicly accessible database of all significant Australian earthquakes recorded since 1955. An interrogation of the database for 50km surrounding Lake Keepit since 1956 shows that there has been little seismic activity in the surrounding area since the dam's construction in 1960, of which the 8th June 2012 quake was by far the largest. This quake was followed by several aftershocks, which are posted on EPSO's log of Australian events.	VM hor acceln VM hor velocity FBV Z velocity S6000 triaxial SS-1 vertical	psn psn psn psn psn
2012-05-08	11:26:40	A small ≈M1.3 event located at around 51km from EPSO. But this event was also weakly recorded at ARMA and CMSA, from which the ASC computed an approximate epicentre position of -30.92, 149.30, and a depth of 28km. This is only 12km distant from the best estimated epicentre location* of -30.83, 149.37 for the 1969 M5.0 Coonabarabran Earthquake (*McCue, 2011). This 1969 event was one of the 12 strongest earthquakes ever recorded in NSW, and did minor damage to Coonabarabran township.	S6000 triaxial	psn
2012-04-11	08:38:32	Gigantic Magnitude 8.6 Earthquake located off the West Coast of Northern Sumatra, Indonesia. This event's epicentre was along the same fault which caused the devastating Boxing Day Earthquake and tsunami of 26th December 2004, but due to the strike-slip nature of the fault's surface rupture, no large displacement of seawater occurred and the resulting tsunami was small. At EPSO, located some 7000km distant from the epicentre, the ground moved backward and forward with a peak displacement amplitude of 4.3mm, with a period of around 27 seconds. This may be compared with the 1.4mm displacement caused by the Tōhoku earthquake of 11th March 2011, and the 2.4mm displacement caused by the Chile Earthquake of 27th February, 2010. It's unlikely I'll ever again see such a large ground displacement at EPSO from any event, overseas or otherwise.	VM hor acceln VM hor velocity VM hor acceln (+/- 12h)	psn psn psn
2012-03-23	09:25:14	The biggest Australian earthquake for around a decade. This Magnitude (Mw 5.4) event occurred nearby the remote settlement of Ernabella, South Australia. Robert Herrmann’s moment tensor analysis for this event may be found here. GA's ML estimate was 5.7, whereas my ML (referenced to my Ranger SS-1 Vertical instrument) was 4.6.	VM hor acceln VM hor velocity FBV Z velocity S6000 triaxial SS-1 vertical	psn psn psn psn psn
2012-03-14	19:07:44	A relatively small quake off the Off W Coast of South Island, New Zealand, appears to have generated a conspicuous T-wave, where acoustical water waves have been generated on the sea floor by the earthquake, and propagated until they encountered Australia's continental shelf, where some of the acoustical energy was converted back to seismic waves. The Great Circle distance from EPSO to this earthquake's epicentre is 2174km. The distance from EPSO to the edge of the Australian continental shelf (on the direct EPSO-earthquake track) is about 380km. From this location, a seismic P-wave takes around 54 seconds to travel to EPSO. By analysing the right-hand seismic traces, the delay between the earthquake's origin time (19:07:44) and shaking commencing at EPSO (19:28:44) resulting from the T-wave arrival, is around 1260 seconds. Assuming this shaking was due to T-waves traveling via the direct Great Circle track and impacting the Australian continental shelf offshore from Sydney, these waves were propagating in the ocean for 1260-54=1206 seconds and covered 2174-380=1794km. In this case the derived speed of the T-waves is 1206/926=1.3km/s in the ocean. But if the T-waves impacted the Australian continental shelf at the closest point to the epicentre (i.e. eastern Tasmania, 1480km distant from the epicentre, and 1280km from EPSO), from this location a seismic P-wave would take around 167 seconds to travel to EPSO. So via this route, the T-waves would have propagated for 1480km for 1206-167=813 seconds, suggesting a T-wave propagation velocity of 1.8km/s. Therefore the ocean T-wave propagation speed is in the range 1.3-1.8km/s. The average of these two limits is around 1.5km/s which is approximately the speed of sound in seawater, and is consistent with the propagation of the T-waves waves via the so called SOFAR channel. Most of the spectral energy in the T-wave induced shaking observed at EPSO, is contained within the 1.5-2.6Hz spectral band.	S6000 SS-1 vertical	psn psn
2012-01-05	06:00:00	Vertical motions recorded from EPSO's new Inyo Force Balance Vertical (FBV) instrument, during the passage of an intense overhead thunderstorm. At this time the FBV instrument was not barometrically isolated and therefore susceptible to detecting perturbations in atmospheric pressure, which were considerable during the passage of the storm. The FFT spectrum of this 40m dataset, shows pressure perturbations peaking in amplitude at around a 60s period.	Inyo FBV	psn
2011-12-04	19:04:42	Small ML=0.3 event at 47km range from EPSO, with striking similarity to an event logged 2011-05-16 10:40:57 The range and general appearance of these two trace codas are extremely similar, and the 3-axis traces for the first 0.2s are practically identical, suggesting the events have a common origin. Analysis of the initial P-wave arrival by the ASC indicates that the event location was in a general eastwards direction from EPSO, which is in an area of ancient volcanism, quite interesting to drive through.	S6000 triaxial	psn
2011-12-02	01:31:36	Presumed mining blast from around -32.62, 151.17 (ASC) but with unusually strong low frequency components which registered unusually strongly on Volksmeter long period instrument. S-6000 ML=2.3, Volksmeter ML=3.5.	S6000 VM hor acceln VM hor velocity	psn psn psn
2011-11-22	18:05:12	Arrival of P-waves from a M6.6 quake in Beni, Bolivia. This arrival had an initial strong vertical peak velocity of 7.6μm/s, of frequency around 2.5Hz. Significant amplitude long period waves (i.e surface waves) didn't follow this arrival, an effect which is caused by the quake's great depth, of about 533km.	S6000	psn
2011-10-14	11:29:45	Nearby thunderclap recorded on Sprengnether S-6000	S6000	psn
2011-10-11	03:30:00	D4 Bulldozer working a few metres from EPSO's vault. This induced several northward-falling step functions in VM tilt, and peak ground velocities of around 70-75um/s horizontally and 17um/s vertically.	VM hor acceln S6000	psn psn
2011-10-05	05:00:00	D4 Bulldozer clearing firebreaks 270-440m from EPSO's vault.	S6000	psn
2011-08-10	02:27:48	Possible ML=2.0 Mining Blast, apparently from range=249km, but with unusually low frequency components.	VM hor acceln VM hor velocity L15B triaxial SS-1 vertical	psn psn psn psn
2011-07-29	00:10:00	Our neighbour chopping wood, 220m distant.	SS-1 vertical	psn
2011-07-27	23:55:00	Our Toyota sedan car returning up our driveway.	L15B triaxial SS-1 vertical	psn psn
2011-07-27	22:45:00	Our Toyota sedan car departing down our driveway.	L15B triaxial SS-1 vertical	psn psn
2011-07-18	09:00:00	Relatively weak microseismic noise. Volksmeter RMS acceleration = ~0.4um/s/s & RMS velocity = ~0.25um/s. Peak period = 4-7s. Ranger SS-1 Geophone (vertical) RMS velocity = ~6nm/s. 60m records	VM hor acceln VM hor velocity SS-1 vertical	psn psn psn
2011-06-21	14:49:31	Step function change in EPSO's pier tilt, toward the North.	VM hor acceln	psn
2011-06-21	14:30:05	Step function change in EPSO's pier tilt, toward the South East.	VM hor acceln	psn
2011-06-04	23:00:00	Exceptionally strong microseismic noise. Volksmeter RMS acceleration = ~1.1um/s/s & RMS velocity = ~1.4um/s. Peak period = 7.4s. Ranger SS-1 Geophone (vertical) RMS velocity = ~9nm/s. 60m records.	VM hor acceln VM hor velocity SS-1 vertical	psn psn psn
2011-05-30	12:37:08	Step function change in EPSO's pier tilt, toward the South East, following a period of light rain (13mm total).	VM hor acceln	psn
2011-05-22	16:42:24	Two small teleseismic quakes (from the Philippines) arriving concurrently to give the impression of a nearby regional event.	SS-1 vertical	psn
2011-05-16	10:40:57	ML=0.9 Small event at ~47km range	L15B triaxial SS-1 vertical	psn psn
2011-04-19	06:05:00	Chopping firewood, 35m NE of EPSO, Australia	L15B triaxial SS-1 vertical	psn psn
2011-04-18	19:37:51	Passing kangaroos. Note the constant pulse repetition frequency.	L15B triaxial SS-1 vertical	psn psn
2011-04-14	08:22:13	Step function on Volksmeter N-S acceleration channel, most likely due to friction from electrostatically charged dust bridging Volksmeter pendulum and capacitor plates.	VM hor acceln	psn
2010-12-30	09:27:04	18m-tall 1-ton tree felled 35m NE of EPSO, Australia. Caused a step-function on Volksmeter acceleration trace	VM hor acceln L15B triaxial SS-1 vertical	psn psn psn
2010-12-25	14:50:30	Mysterious strong overnight twangs, strongly N-S polarised (geophone rotated 90 degrees, so apparent E-W channel is N-S)	L15B triaxial	psn
2010-12-24	07:36:10	15m-tall tree felled 30m NE of EPSO	L15B triaxial	psn
2010-12-23	17:38:13	Mysterious strong overnight twangs, strongly N-S polarised.	L15B triaxial	psn
2010-11-10	17:24:38	Nearby lightning strike	SS-1 vertical	psn
2010-10-23	16:48:57	Large tree limb falling, about 100m NW of EPSO	L15B triaxial	psn
2010-10-15	22:25:00	Exceptionally strong microseismic noise	SS-1 vertical	psn
2010-10-11	23:32:00	Our clothes washing machine commencing 980rpm spin cycle	L15B hor velocity	psn
2010-09-24	16:42:21	Passing kangaroo or wallaby	SS-1 vertical	psn
2010-01-02	00:00:00	Nearby creek (220m distant) in major flood	SS-1 vertical	psn

Sensors used for these measurements include the Volksmeter (VM), Kinemetrics SS-1 Ranger (SS-1), Marks Products L-15B (L15B) and Sprengnether S-6000 (S6000)