PNSN >


Archive of Interesting Events from the PNSN Legacy Webicorder Displays

About the PNSN Legacy Webicorders

The following is a selection of interesting earthquakes or seismic events for which copies of the legacy webicorders were saved as a record for comparison with other events. This is not a comprehensive list of interesting events, just those for which webicorder records were kept and covers the time period from 1998 through 2005.

Most recent is at the top.



March. 28, 2005, Magnitude 8.7 Sumatra earthquake ASR_SHZ_UW..... BBO_SHZ_UW..... BOW_SHZ_UW..... BRKS_HHZ_UW..... CBS_SHZ_UW..... CDF_SHZ_UW..... CPW_SHZ_UW..... DBO_SHZ_UO..... ELL_SHZ_UW..... EUO_SHZ_UO..... FMW_SHZ_UW..... FRIS_SHZ_UO..... GNW_SHZ_UW..... GRCC_BHZ_UW..... GSM_SHZ_UW..... HBO_SHZ_UW..... HDW_SHZ_UW..... HOG_SHZ_UW..... HOOD_SHZ_UW..... HSR_SHZ_UW..... HUO_SHZ_UO..... JCW_SHZ_UW..... JUN_SHZ_UW..... KMO_SHZ_UW..... LNO_SHZ_UW..... LO2_SHZ_UW..... LON_SHZ_UW..... LTY_SHZ_UW..... MBW_SHZ_UW..... NCO_SHZ_UW..... OFR_SHZ_UW..... OPC_SHZ_UW..... OSD_SHZ_UW..... PIN_SHZ_UO..... RCM_SHZ_UW..... RCS_SHZ_UW..... RPW_SHZ_UW..... RSW_SHZ_UW..... SBES_EHZ_UW..... SEP_SHZ_CC..... SHW_SHZ_UW..... STD_SHZ_UW..... STW_SHZ_UW..... SUG_SHZ_UW..... SVOH_EHZ_UW..... TDH_SHZ_UW..... TTW_SHZ_UW..... UWFH_EHZ_UW..... VFP_SHZ_UW..... VTH_SHZ_UW..... WIFE_SHZ_CV..... WISH_SHZ_UW..... YEL_SHZ_UW


Dec. 26, 2004, Magnitude 9.0 Sumatra earthquake
ASR_SHZ_UW...... BBO_SHZ_UW...... BLIS_SHZ_CV...... BOW_SHZ_UW...... CBS_SHZ_UW...... CDF_SHZ_UW...... CPW_SHZ_UW...... DBO_SHZ_UO...... ELL_SHZ_UW...... EUO_SHZ_UO...... FMW_SHZ_UW...... FRIS_SHZ_UO...... GNW_SHZ_UW...... GRCC_BHZ_UW...... GSM_SHZ_UW...... HBO_SHZ_UW...... HOG_SHZ_UW...... HOOD_SHZ_UW...... HSR_SHZ_UW...... HUO_SHZ_UO...... JCW_SHZ_UW...... JUN_SHZ_UW...... KMO_SHZ_UW...... LNO_SHZ_UW...... LO2_SHZ_UW...... LON_SHZ_UW...... MBW_SHZ_UW...... MCW_SHZ_UW...... NCO_SHZ_UW...... OFR_SHZ_UW...... OPC_SHZ_UW...... OSD_SHZ_UW...... PIN_SHZ_UO...... RCM_SHZ_UW...... RCS_SHZ_UW...... RPW_SHZ_UW...... RSW_SHZ_UW...... SBES_EHZ_UW...... SEP_SHZ_CV...... SFER_EHZ_UW...... SHW_SHZ_UW...... STD_SHZ_UW...... STW_SHZ_UW...... SVOH_EHZ_UW...... TDH_SHZ_UW...... TTW_SHZ_UW...... UWFH_EHZ_UW...... VFP_SHZ_UW...... VTH_SHZ_UW...... WIFE_SHZ_CV...... YEL_SHZ_UW

Selected webicorders for the September-December 2004 - Mount St. Helens eruption swarm sequence - special page

June - July 2004, Lakeview Oregon earthquake sequence M 4.4 on June 30, M 4.3 on July 22 Special Pages
We recommend that you return to this page rather than using the navigation on the webicorders
July 22, 2004 - 1:26:27 PM (PDT): FMW_..... FRIS..... GNW_..... HOOD..... HUO_..... JCW_..... LON_..... MBW_..... MOON..... STW_..... TDH_.....
--------------------------------------------------------
June 30, 2004 - 05:21:45.80 AM (PDT) : FMW_..... FRIS..... GNW_..... HOOD..... HUO_..... JCW_..... LON_..... MBW_..... MOON..... TDH_.....



June 3, 2004, Meteorite Boom at 2:40 PDT

On June 3, 2004 at 2:40 AM PDT a meteor burst was seen, heard and felt in the central Puget Sound. The PNSN recorded this event on many seismograph stations throughout the area. Asterisks (*) below designate stations where we picked an arrival time for this event using full-resolution data (the webicorders are quick-loading, but incomplete representations of the data.

From what we can see on our records, record section of first few stations with map) this appears to be a single explosive source rather than a "sonic boom" type moving source. Our estimate of the location of the "boom" places it at an altitude of 43 km over Snohominsh, WA. Since there were reports from eastern Washington (and even Colorado) of seeing it, it must have been high enough there not to have left a sonic trail on our eastern Washington stations. When it arrived near Snohomish it apparently exploded.

Story from the Seattle PI

We recommend that you return to this page rather than using the navigation on the webicorders
ALCT..... *ATES..... *BABE..... *BRKS..... COLT..... DBO..... *EARN..... *EGRN..... *EVCC..... *EVGW..... EYES..... *FINN..... *FMW..... FRIS..... *GNW..... GPW..... *HICC..... HOOD..... *HSR..... HUBA..... HUO..... *JCW..... *KIMB..... KNJH..... LAWT..... *LEOT..... LON..... *MBKE..... *MBW..... *MCW..... *MEAN..... MOON..... *NIHS..... *OFR..... *OHC..... *OPC..... PAYL..... *PNLK..... *RCS..... *RHAZ..... *RPW..... *RRHS..... RSW..... *SBES..... *SCC..... *SEP..... SFER..... SMNR..... STW..... *SVOH..... *SVTR..... *SWID..... TDH..... *UWFH..... *VVHS..... *WISC..... WWHS



March 23-25, 2004 - Earthquake swarm at Three Sisters, Oregon Largest events are M 1.9 (3/23 and 3/25 UTC); station MOON is intermittently dysfunctional and appears saturated.

MOON_EHZ_UW.2004032300.html
MOON_EHZ_UW.2004032312.html

MOON_EHZ_UW.2004032400.html FRIS_EHZ_UO.2004032400.html MOON_EHZ_UW.2004032412.html FRIS_EHZ_UO.2004032412.html

MOON_EHZ_UW.2004032500.html FRIS_EHZ_UO.2004032500.html MOON_EHZ_UW.2004032512.html FRIS_EHZ_UO.2004032512.html

Earthquakes in Sisters area; Jan. 1, 2004-March 29, 2004: DATE-(UTC)-TIME LAT(N) LON(W) DEP MAG QUAL COMMENTS yy/mm/dd hh:mm:ss deg. deg. km Ml 04/03/23 18:50:42 44.12N 121.81W 3.6 0.9 AD 04/03/23 19:06:59 44.12N 121.81W 3.5 0.2 AD 04/03/23 19:14:47 44.13N 121.81W 4.6 0.7 DD 04/03/23 19:17:04 44.13N 121.81W 3.5 0.5 AD 04/03/23 19:17:56 44.13N 121.80W 6.1 0.7 AD 04/03/23 19:25:29 44.13N 121.82W 3.2 0.4 DD 04/03/23 19:30:34 44.13N 121.78W 8.8 0.7 AD 04/03/23 19:34:43 44.11N 121.81W 6.3 0.6 CD 04/03/23 19:44:47 44.12N 121.80W 7.1 0.3 CD 04/03/23 19:45:56 44.14N 121.77W 11.0 0.1 AD 04/03/23 19:51:47 44.12N 121.81W 3.6 0.0 AD 04/03/23 20:15:42 44.12N 121.80W 3.5 0.5 BD 04/03/23 22:32:53 44.15N 121.78W 16.4 0.9 BD 04/03/23 23:28:33 44.12N 121.80W 10.1 0.7 AD 04/03/23 23:31:14 44.13N 121.78W 9.3 0.9 AD 04/03/23 23:35:23 44.14N 121.78W 6.9 0.4 AD 04/03/23 23:44:19 44.14N 121.78W 8.8 1.0 AD 04/03/23 23:47:15 44.13N 121.79W 11.8 1.4 BD 04/03/24 00:08:36 44.13N 121.80W 4.5 0.8 AD 04/03/24 00:14:08 44.12N 121.79W 7.4 1.1 BD 04/03/24 00:46:31 44.13N 121.78W 9.5 1.2 AD 04/03/24 00:56:26 44.12N 121.79W 8.5 1.5 BB 04/03/24 01:07:27 44.13N 121.78W 10.7 0.7 AD 04/03/24 01:09:27 44.12N 121.79W 6.7 1.9 BC 04/03/24 01:24:44 44.14N 121.77W 11.1 1.0 AD 04/03/24 01:29:12 44.15N 121.77W 9.6 0.4 AD 04/03/24 01:34:53 44.13N 121.78W 8.0 1.5 AB 04/03/24 01:50:09 44.12N 121.79W 9.1 1.2 AD 04/03/24 01:53:19 44.13N 121.79W 9.4 1.1 BD 04/03/24 01:53:48 44.12N 121.81W 3.5 0.8 AD 04/03/24 01:59:20 44.13N 121.78W 8.3 0.9 AD 04/03/24 02:03:11 44.13N 121.79W 13.2 0.5 AD 04/03/24 02:08:21 44.14N 121.78W 12.9 0.6 AD 04/03/24 02:11:13 44.15N 121.78W 14.8 0.5 AD 04/03/24 02:12:54 44.13N 121.80W 4.1 0.7 AD 04/03/24 02:18:37 44.13N 121.81W 4.1 0.6 DD 04/03/24 02:20:56 44.14N 121.77W 10.3 1.2 AD 04/03/24 02:21:55 44.15N 121.77W 9.1 0.5 AD 04/03/24 02:26:24 44.11N 121.81W 3.4 0.6 AD 04/03/24 02:33:38 44.15N 121.78W 12.8 0.5 AD 04/03/24 02:33:54 44.12N 121.79W 10.0 1.2 AD 04/03/24 02:44:37 44.12N 121.80W 6.8 0.6 CD 04/03/24 03:02:05 44.11N 121.79W 3.1 1.1 CC 04/03/24 03:48:12 44.13N 121.79W 13.5 0.9 AD 04/03/24 04:28:10 44.14N 121.78W 14.9 0.7 BD 04/03/24 05:22:54 44.14N 121.79W 9.6 1.2 BC 04/03/24 06:15:24 44.14N 121.81W 16.5 0.6 AD 04/03/24 06:48:58 44.14N 121.80W 15.0 1.4 AC 04/03/24 07:10:39 44.16N 121.87W 17.2 0.6 AD 04/03/24 08:06:50 44.13N 121.79W 13.5 1.0 AD 04/03/24 09:53:24 44.12N 121.81W 3.2 0.6 DD 04/03/24 10:12:20 44.15N 121.76W 11.2 0.8 AD 04/03/24 10:40:50 44.14N 121.77W 11.1 0.4 AD 04/03/24 11:08:31 44.14N 121.77W 12.1 0.4 AD 04/03/24 11:32:02 44.14N 121.78W 7.9 1.0 AD 04/03/24 12:02:44 44.11N 121.77W 16.1 1.5 BB 04/03/24 13:02:36 44.13N 121.79W 7.4 1.4 AD 04/03/24 13:51:06 44.12N 121.76W 16.8 1.4 BB 04/03/24 14:13:59 44.12N 121.80W 3.5 0.6 AD 04/03/24 15:46:47 44.13N 121.79W 6.5 1.6 AC 04/03/24 16:13:31 44.12N 121.81W 3.5 0.7 AD 04/03/24 16:17:48 44.14N 121.77W 10.9-0.1 AD 04/03/24 16:26:59 44.12N 121.80W 3.5 0.7 AD 04/03/24 17:41:18 44.13N 121.79W 5.8 0.8 AD 04/03/24 18:21:14 44.15N 121.76W 11.3 0.1 AD 04/03/24 18:32:10 44.14N 121.79W 7.4 0.8 BD 04/03/24 20:47:33 44.13N 121.79W 9.2 0.7 BD 04/03/24 21:16:56 44.14N 121.78W 7.2 1.0 AD 04/03/24 22:24:18 44.12N 121.79W 3.2 1.0 CD 04/03/24 23:33:04 44.13N 121.78W 6.4 0.5 AD 04/03/24 23:42:03 44.12N 121.80W 3.5 0.6 AD 04/03/25 00:02:50 44.15N 121.76W 9.9 0.5 AD 04/03/25 00:27:15 44.14N 121.77W 7.9 1.2 CB 04/03/25 03:48:42 44.13N 121.79W 4.1 1.0 AD 04/03/25 03:53:48 44.13N 121.79W 6.8 1.0 BD 04/03/25 04:32:50 44.14N 121.77W 9.8 0.7 AD 04/03/25 08:26:27 44.13N 121.78W 8.1 0.8 AD 04/03/25 19:44:06 44.13N 121.78W 6.8 1.9 AB



December 22, 2003 - Magnitude 6.5 earthquake near the coast of central California between the towns of Cambria and San Simeon. Two fatalities in Paso Robles, where a roof and part of a building collapsed.
DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
03/12/22 19:16:46  37.71N 121.10W  7.6 6.5    11 km (6 miles) NE (49) from San Simeon, CA
                                     17 km (10 miles) N (356) from Cambria, CA

ALCT_ENZ...... ATES_ENZ...... BRKS_HHZ...... CBS_EHZ...... DBO.EHZ...... EGRN_ENZ...... EVCC_ENZ...... EVGW_ENZ...... EYES_ENZ...... FINN_ENZ...... FMW_EHZ...... GNW_EHZ...... GPW_EHZ...... HICC_ENZ...... HOLY_ENZ...... HOOD_EHZ...... HSR_EHZ...... HUBA_ENZ...... HUO_EHZ...... JCW_EHZ...... KIMB_ENZ...... LAWT_ENZ...... LEOT_ENZ...... LON_EHZ...... MBKE_ENZ...... MBW_EHZ...... MCW_EHZ...... MEAN_ENZ...... MOON_EHZ...... NIHS_ENZ...... OFR_BHZ...... OPC_BHZ...... PNLK_HHZ...... RBEN_ENZ...... RCS_EHZ...... RHAZ_ENZ...... RPW_EHZ...... RRHS_ENZ...... RSW_EHZ...... SCC_ENZ...... SEP_EHZ...... SFER_EHZ...... SMNR_ENZ...... STW_EHZ...... SVOH_EHZ...... SVTR_ENZ...... SWID_ENZ...... TDH_EHZ...... VVHS_ENZ...... WISC_ENZ...... WWHS_ENZ......



April 25, 2003 - Brinnon 4.8 mainshock and 2.9 aftershock. Recorded on a broad-band vertical instrument at Olympic Peninsula College in Port Angeles. Note the size difference between the signals from the two events.
DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
03/04/25 10:02:12  47.67N 123.24W  51.3 4.8  BA  FELT   37.3 km ESE of Mt Olympus, WA
03/04/25 11:56:35  47.67N 123.23W  49.6 2.9  BB   37.8 km ESE of Mt Olympus, WA

OPC_BHZ



Feb.-March, 2003 - Deep tremor beneath Puget Sound associated with silent earthquakes slip

Information, including samples of webicorders for the first deep tremor episode recognized at the PNSN in Feb-Mar, 2003



Nov. 3, 2002 - McKinley Park, Alaska, Denali Fault Earthquake, Mw=7.9 -- The earthquake occurred at 1:11 PM Alaska Standard time - 2:12 PM Pacific Standard Time - 22:12 UTC. USGS EQ Hazards Program Denali Fact Sheet

ALCT_ENZ...... ATES_ENZ...... BABE_ENZ...... BEVT_ENZ...... BRKS_HHZ...... CBS_EHZ...... CPW_EHZ...... EARN_ENZ...... EGRN_ENZ...... EVCC_ENZ...... EVGW_ENZ...... FMW_EHZ...... GNW_BHZ...... GPW_EHZ...... HICC_ENZ...... HOLY_ENZ...... HSR_EHZ...... HUO_EHZ...... JCW_EHZ...... KIMB_ENZ...... KNJH_ENZ...... LAWT_ENZ...... LEOT_ENZ...... LON_BHZ...... MARY_ENZ...... MBKE_ENZ...... MBW_EHZ...... MOON_EHZ...... NEW_BHZ...... NIHS_ENZ...... OFR_EHZ...... OHC_ENZ...... OPC_BHZ...... PAYL_ENZ...... PNLK_ENZ...... RBEN_ENZ...... RCS_EHZ...... RHAZ_ENZ...... RPW_EHZ...... RRHS_ENZ...... RSW_EHZ...... SBES_EHZ...... SEP_EHZ...... SFER_EHZ...... SGAR_ENZ...... SMNR_ENZ...... SVOH_EHZ...... SWES_ENZ...... SWID_ENZ...... TDH_EHZ...... UPS_ENZ...... UWFH_EHZ...... WISC_ENZ



June 29, 2002, Mount Hood, Ml=4.5 earthquake as seen on the nearby station, TDH and on a Mount St. Helens station, HSR. Also see the special earthquake page for this event.

April 21, 2002, Swift Reservoir Power Canal Collapse - The Swift Reservoir Power Canal near Mount St. Helens collapsed early on Sunday, April 21st, with almost 800 million gallons of water spilling out in a few hours. A hydroelectric powerhouse was destroyed and part of a state highway was washed out.

November 11, 2001: A Magnitude 4.0 earthquake near Spokane, Washington - Special Page on Spokane Sequence
 Spokane earthquakes on 11/11/01
List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
01/11/11 16:00:29  47.68N 117.40W   4.7 4.0  BC  FELT    1.9 km   N of Spokane, WA
01/11/11 17:21:33  47.68N 117.40W   0.6 3.1  BC  FELT    1.3 km   N of Spokane, WA

SHORT PERIOD CBS_EHZ.... FMW_EHZ.... GPW_EHZ.... JCW_EHZ.... MBW_EHZ.... RPW_EHZ.... RSW_EHZ....

BROAD-BAND NEW_BHZ

STRONG MOTION (filtered to look like SHORT PERIOD) SFER_ELZ....



November 2001: Swarm activity on dome of Mt. St. Helens - SPECIAL WEB PAGE

August 14, 2001: Debris flow on Mt. Rainier - SPECIAL WEB PAGE

June 25, 2001: A Magnitude 3.7 earthquake near Spokane, Washington

Special Page on Spokane Sequence
 Spokane earthquakes on 6/25/01 - Some are visible on helicorders
List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
01/06/25 14:15:22  47.68N 117.39W  10.5 3.9  BD  FELT    1.3 km NNE of Spokane, WA
01/06/25 15:01:27  47.70N 117.41W  11.1 3.4  DD  FELT    3.4 km   N of Spokane, WA
01/06/25 15:05:27  47.75N 117.49W   1.6 1.3  CD   11.4 km  NW of Spokane, WA
01/06/25 15:06:06  47.71N 117.44W   0.4 2.8  DD    5.3 km  NW of Spokane, WA
01/06/25 15:17:52  47.73N 117.46W   3.5 1.9  CD    8.2 km NNW of Spokane, WA
01/06/25 15:40:39  47.71N 117.47W   2.6 1.8  CD    7.4 km  NW of Spokane, WA
01/06/25 16:49:16  47.73N 117.47W   0.0 2.3  BD  FELT    9.0 km NNW of Spokane, WA
01/06/25 20:48:37  47.73N 117.45W   0.0 2.2  CD    8.0 km NNW of Spokane, WA
01/06/25 22:58:13  47.72N 117.46W   0.0 2.3  DD  FELT    7.0 km  NW of Spokane, WA

SHORT PERIOD CBS_EHZ.... FMW_EHZ.... JCW_EHZ.... RCM_EHZ.... RPW_EHZ.... RSW_EHZ

BROAD-BAND NEW_BHZ



June 10, 2001: A Magnitude 5.0 earthquake near Satsop, Washington

SHORT PERIOD BLN_EHZ... CBS_EHZ... FMW_EHZ... JCW_EHZ... RCM_EHZ... RPW_EHZ... RSW_EHZ... SHW_EHZ... SOS_EHZ... TDH_EHZ

BROAD-BAND DBO_BHZ... GNW_BHZ... LON_BHZ... NEW_BHZ

STRONG MOTION (filtered to look like short period) ALCT_ELZ... CSEN_ELZ... EARN_ELZ... FINN_ELZ... HOLY_ELZ... KIMB_ELZ... LAWT_ELZ... LEOT_ELZ... PNLK_ELZ... RBEN_ELZ... RHAZ_ELZ... SBES_ELZ... WISC_ELZ

List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
01/06/10 13:19:11  47.16N 123.50W  40.7 5.0  BA  FELT   18.3 km   N of Satsop, WA 



Feb. 28, 2001: The Nisqually Earthquake A Magnitude 6.8 damaging earthquake in the Puget Basin

SHORT PERIOD CBS_EHZ ... FMW_EHZ ... JCW_EHZ ... RCM_EHZ ... RPW_EHZ ... RSW_EHZ ... SHW_EHZ ... SOS_EHZ ... TDH_EHZ

BROAD-BAND DBO_BHZ ... GNW_BHZ ... LON_BHZ ... NEW.BHZ ... BRKS_HHZ ... SP2_HHZ ...

STRONG MOTION (filtered to look like short period) KIMB_ELZ ... LAWT_ELZ ... LEOT_ELZ ... PNLK_ELZ ... RBEN_ELZ ... RHAZ_ELZ ... SBES_ELZ ... WISC_ELZ ...

List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
01/02/28 18:54:32  47.14N 122.72W  51.9 6.8  BA  FELT   17.0 km  NE of Olympia, WA

Jan. 13, 2001: A regional earthquake (CA) and a teleseism from a distant earthquake(El Salvador), recorded by seismometers in Washington and Oregon.

BLN CBS_EHZ ... DBO_BHZ ... FMW_EHZ ... GNW_BHZ ... JCW_EHZ ... LON_BHZ ... NEW_BHZ ... RCM_EHZ ... RPW_EHZ ... RSW_EHZ ... SHW_EHZ ... SOS_EHZ ... SP2_HHZ ... TDH_EHZ

List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG  COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
01/01/13 13:08:46  40.66N 125.35W  10.0 4.8   102.2 km   W of Eureka, CA
01/01/13 17:41:25  15.88N  86.15W   0.0 7.6  	El Salvador - Hundreds dead, many buildings destroyed - Visible on all webicorders, large amplitude. Best view on Broad-Bands (BHZ) 
01/01/13 21:26:32  46.70N 122.76W   6.8 2.3    1.2 km  SE of Centralia Blast site D, WA - Mining Blast - low amplitude signal visible on many traces.


December 24, 2000: A felt earthquake just east of the Cascades.
BLN_EHZ... CBS_EHZ... FMW_EHZ... GNW_BHZ... JCW_EHZ... LON_BHZ... RCM_EHZ... RPW_EHZ... RSW_EHZ... SHW_EHZ... SOS_EHZ... SP2_HHZ... TDH_EHZ
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
00/12/24 17:04:58  47.74N 120.26W   8.6 3.5  DB  FELT    9.8 km NNW of Entiat, WA


December, 2000 Earthquake Cluster near the Tri-Cities, WA : A small cluster of earthquakes began on December 12, 2000 about 18 miles west of the Tri-Cities (Richland, Pasco, and Kennewick, WA). The epicenters are near the top of the Horse Heaven Hills 8 miles east of Prosser.

Blasts recorded during Seismic Hazards in Puget Sound (SHIPS) Experiments

Sept. 21 and 22, 1999; blasts - recorded at station JCW in northwestern Washington. Relatively small amplitude blast signals, recorded at some distance.
JCW_EHZ_UW.19990921... JCW_EHZ_UW.19990922

 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
99/09/20 08:04:00  47.66N 121.83W   0.0 1.2  BC    5.9 km ENE of Carnation, Wa
99/09/20 09:30:00  47.70N 123.04W   1.4 1.5  BB   30.1 km   W of Poulsbo, WA
99/09/20 09:31:59  47.72N 123.02W  15.4 1.1  AD   28.6 km   W of Poulsbo, WA
99/09/20 09:36:00  47.65N 121.70W   0.0 1.6  BA   15.5 km   E of Carnation, Wa
99/09/20 11:08:00  47.66N 121.61W   4.3 2.7  BB   19.2 km WSW of Skykomish, WA
99/09/21 08:12:01  47.70N 122.76W  14.6 0.9  CC    9.5 km WSW of Poulsbo, WA
99/09/21 09:34:00  47.71N 122.92W   0.1 1.6  BC   21.4 km   W of Poulsbo, WA
99/09/21 09:36:00  47.65N 121.71W   4.0 1.7  CB   14.9 km   E of Carnation, Wa
99/09/21 09:42:01  47.67N 122.73W   1.3 1.6  AC    9.0 km  SW of Poulsbo, WA
99/09/22 08:00:01  47.67N 122.25W   0.0 1.3  BA    3.5 km WSW of Kirkland, Wa
99/09/22 08:14:02  47.66N 122.43W   0.0 1.9  BB   10.7 km  NW of Seattle, WA
99/09/22 09:30:01  47.68N 122.24W   0.0 1.7  BA    2.9 km   W of Kirkland, Wa
99/09/22 09:34:01  47.63N 122.17W   0.0 1.0  BC    3.6 km NNE of Bellevue, WA
99/09/22 09:38:01  47.68N 122.72W   0.7 1.3  AD    8.1 km  SW of Poulsbo, WA
99/09/22 09:40:02  47.66N 122.56W   2.9 1.2  AC   10.2 km  SE of Poulsbo, WA
99/09/22 09:44:02  47.63N 122.30W   0.0 1.9  DB    4.7 km NNE of Seattle, WA


January 11, 1999: A swarm of events recorded at station VLL near Mt. Hood - starts near bottom of record.

VLL

List of Quakes in UTC (UTC time scale is on the right side of webicorders)
 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
99/01/11 12:29:31  45.32N 121.65W   6.5 1.9  BB    6.5 km SSE of Mt Hood, OR
99/01/11 13:25:55  45.32N 121.66W   5.2 2.1  BC    6.4 km SSE of Mt Hood, OR
99/01/11 13:48:46  45.32N 121.65W   7.5 2.5  CB  FELT    6.5 km SSE of Mt Hood, OR
99/01/11 14:08:58  45.32N 121.66W   6.4 1.7  BB    6.5 km SSE of Mt Hood, OR
99/01/11 14:20:09  45.33N 121.67W   1.1 1.7  DC    4.6 km SSE of Mt Hood, OR
99/01/11 14:24:47  45.31N 121.66W   3.0 1.4  AC    6.6 km SSE of Mt Hood, OR
99/01/11 14:39:33  45.31N 121.65W   6.6 1.7  BB    7.0 km SSE of Mt Hood, OR
99/01/11 15:01:28  45.32N 121.65W   5.1 1.4  BC    6.7 km SSE of Mt Hood, OR
99/01/11 16:54:11  45.32N 121.65W   7.0 3.0  BB  FELT    6.6 km SSE of Mt Hood, OR
99/01/11 22:04:14  45.31N 121.65W   6.9 3.2  BB  FELT    7.0 km SSE of Mt Hood, OR
99/01/11 22:07:19  45.32N 121.66W   4.5 1.1  AC    6.4 km SSE of Mt Hood, OR
99/01/11 22:11:09  45.31N 121.65W   6.7 2.0  BB    7.0 km SSE of Mt Hood, OR
99/01/11 22:16:42  45.32N 121.66W   5.9 1.8  CB    5.7 km SSE of Mt Hood, OR
99/01/11 23:13:24  45.31N 121.65W   5.4 1.7  BC    7.2 km SSE of Mt Hood, OR
99/01/11 23:56:26  45.32N 121.66W   7.2 1.0  BB    6.2 km SSE of Mt Hood, OR


November 15, 16, 17, and 18, 1998: Interesting periodic signals from Mt. Rainier, recorded at station RCS, located at Camp Schurman. Tiny low amplitude signals, probably from ice are initially irregular in time. Signals become regularly spaced, about every 16 minutes, on 11/16 at 6:00 PST, continuing with progressively changing frequency until about 13:30. The tiny periodic events pick up again on 11/17 and continue into 11/18. The changes in event frequency cause the events to line up on the page in a way that looks like a chevron flight of birds.

RCS_EHZ_1998/11/15.... RCS_EHZ_1998/11/16.... RCS_EHZ_1998/11/17.... RCS_EHZ_1998/11/18





This is file SEIS/PNSN/WEBICORDER/INTERESTING/welcome.html Last updated 11/6/02 - If you see any problems e-mail: seis_info@ess.washington.edu