STRONG EARTHQUAKE SEQUENCE HITS CALIFORNIA AFTER ML 3.7 IN LA AREA TODAY

SUMMARY

There was a strong swarm of earthquakes in the region of Los Angeles
this morning beginning 1-2 minutes after the strongest earthquake in
Central England in nearly 10 years. Current parameters for these
events and associated shocks of Ml>=2 are:

O: 28OCT2001 16:37:16 33.9N 118.3W ML=2.2 SCSN E of Hawthorne, CA
O: 28OCT2001 15:29:54 33.9N 118.3W ML=3.0 SCSN SE of Inglewood, CA
O: 28OCT2001 15:39:27 33.9N 118.3W ML=2.6 SCSN SE of Inglewood, CA
O: 28OCT2001 16:21:45 33.9N 118.3W ML=2.8 SCSN SE of Inglewood, CA
O: 28OCT2001 17:05:40 33.9N 118.3W ML=2.4 SCSN E of Hawthorne, CA
O: 28OCT2001 15:27:45 33.9N 118.3W ML=3.7 SCSN NW of Compton, CA
O: 28OCT2001 15:44:26 33.9N 118.3W ML=2.0 SCSN SE of Inglewood, CA

FAR-FIELD EFFECTS:

This event could be considered a FFA from the Banda Sea earthquake
of October 19. That report had stated:

"Areas of U.S. and Canada where triggering may occuR (Ml>=3)

...Southern California south of Los Angeles"

EVENT SEQUENCE:

The current sequence of earthquakes in the general Los Angeles area tend
to occur on Sundays. Checking the SCSN catalog for 2001 it was found that
all 7 events of Ml>=3 in this sequence have, indeed occurred on a Sunday
(including today's) (Table 1).
The sequence also appears to be moving from NW to SE. In the list
below note that the first events on 14 January occurred at about
34.3N 118.4W and have gradually moved SE to today's epicenters
at 33.9N 118.26W. This suggest the segment of the fault in that
region (about 50 km long) may be ready to rupture in an earthquake
of ML>6.
Today's earthquakes were followed by regional events including
a Ml 2.2 near Pine Flat and a Ml 2.6 near Mammoth Lakes within
30 minutes of the Ml 3.7 mainshock. I expect the mainshock may be
triggering areas already under stress from the strong geomagnetic
storm that began this morning and is currently in progress.
The last 5 events of Ml>=3 in the area have occurred during strong
geomagnetic storms or several days after. The timing between geomagnetic
storm and subsequent earthquake has been getting shorter throughout the
year, perhaps indicating the region is getting closer to a
strong, triggered event.

Table 1: Earthquakes of Ml>=3 in the L.A. sequence during 2001

MO DA HR MN SEC YEAR N LAT W LONG DEP ML DAY (TIME) Geomagnetic Storm

1 14 2 26 14.1 2001 34.284 -118.404 8 4.3 SUNDAY (UT) No G-storm
1 14 2 50 53.7 2001 34.289 -118.403 8 4.0 SUNDAY (UT) No G-storm
9 9 23 59 18.0 2001 34.000 -118.387 4 4.2 SUNDAY (UT) G-Storm 9-4
10 7 17 29 7.8 2001 34.000 -118.262 6 3.0 SUNDAY (UT) G-Storm 10-4
10 21 17 28 57.2 2001 34.000 -118.397 10 3.0 SUNDAY (PDT) Strong G-Storm
10 28 16 29 54.2 2001 33.918 -118.281 6 3.0 SUNDAY (UT) Strong G-Storm
10 28 16 27 45.2 2001 33.926 -118.264 6 3.7 SUNDAY (UT) Strong G-Storm

GLOBAL

Within a minute or two of the mainshocks in the Los Angeles area
this morning a moderately strong earthquake hit the United Kingdom.
See:
http://www.emsc-csem.org/cgi-bin/ALERT_all_messages.sh?1
This is the largest earthquake in the United Kingdom since Oct. 5, 1999
(if it is a Ml 4.3, if larger, then the last Ml>=5 in the U.K.
occurred on April 2, 1990. Preliminary location places this
earthquake north of London and SE of Birmingham England. BGS is
giving this event Ml 3.7, however it was felt strongly at MMI V+
in the Nottinghamshire and Lincolnshire region alarming residents
and producing light damage in these regions.
Current parameters for this event are:

O: 28OCT2001 16:25:25 52.8N 0.6W Ml=4.3 CSEM UNITED KINGDOM
O: 28OCT2001 16:25:33 52.3N 1.0W ML=4.5 STR SUD ROYAUME UNI
O: 28OCT2001 16:25:24 52.8N 0.8W ML=3.8 BGS MELTON, ENGLAND

Other events of note in today's seismicity included a Mb 5.8
earthquake in the Tonga/Fiji Islands north of New Zealand;
two events of Ml>3 near Lake Baykal, Russia; a Mb 5.3 in the
Central Aleutian Islands and several aftershocks of this event.

U.S./CANADA

About an hour and a half after the Los Angeles sequence began,
a Mb 5.2 was registered in the central Aleutians (Andreanoff Islands).
A special notice sent last night had warned that a moderate event
could occur in this region following, or coincident with, today's
geomagnetic storm. That notice had stated:

" While these area [referring to sub- and anti-solar areas]
are the most likely to see strong events, other areas in the sub-solar
hemisphere could see seismic enhancements over the next two days. Included
are regions such as the central Aleutians and New Zealand where moderate
seismicity increases may occur immediately."

This event could also be considered a FFA from the Banda Sea earthquake
of October 19. That report had stated:

"Areas of U.S. and Canada where triggering may occur (Ml>=4.0)

....Central Andreanoff Islands"

Two aftershocks of this event have been recorded, but epicentral
information is not conclusive at this time.

In the California/Nevada region a strong seismic episode followed
the Ml 3.7 event south of Los Angeles this morning. 60 earthquakes were
listed from 08:27 through 14:27 PST today. Of these, 15 were of Ml 1.9
or greater, more than a full day's complement in less than a quarter
of a day, approximately 4 times the background rate at this time.
A number of these events occurred outside the larger after/associated
shock zone. Some of these were in Northern California - at Petrolia
(Md 2.6) and Mammoth Lakes (Md 2.6). Earlier in the day earthquakes
had occurred near Coalinga (Ml 2.3) and Ferndale (Ml 2.5). In southern
California, most activity was concentrated in the larger aftershock
zone from about 35-35N 118-117W. A Ml 2.2 also occurred in the
Lake Isabella region.
In Washington a Ml 2.3 earthquake was recorded near Carnation, WA
this morning at 09:27 UT. Montana and Yellowstone also reported
several microearthquakes tody.
Other areas of Canada and the U.S. do not normally report seismicity
during weekend periods.

NEW ZEALAND

The short warning regarding possible immediate effects from the
geomagnetic storm in the central Aleutians (see above under U.S./Canada)
also included the region near New Zealand. A Mb 5.8 was recorded
in the Fiji Islands north of New Zealand this afternoon, and IGNS
reported a Ml 3.7 (and second similar shock) in the Wanganui region
near Wellington, North Island about 3 hours after the CME arrival.

As is common for week-end reports, the seismicity of New Zealand
for the past week (18-25 October) has been listed below.
This was one of the most active weeks in recent memory for the
region. It included events of Ml 5.0 and 4.8 on the South Island,
a Ml 5.9 near Hastings; a swarm of aftershocks of the August 22
earthquake; a swarm in the northern South Island and a Mw 6.8
and aftershocks in the area off the northeast coast of North Island.
Many of these were probably related to geomagnetic storms or
the far-field triggering from Guam, Banda Sea and Kamchatka.

The IGNS on-line Seismometer can be found at:
http://www.gns.cri.nz/news/earthquakes/latest_drum.html

GEOMAGNETIC/SOLAR FIELDS

A CME from the latest X-flare arrived about 03:21 this morning
(UT). There is a sudden decline at that time in the geomagnetic Total
field and a reversal of the earth-directed He field. The change
in the total field is about 15%. For minute-to-minute details see:
http://sec.noaa.gov/ftpdir/lists/geomag/20011028_G10mag_1m.txt

Seismograms at Guam, College Outpost, Alaska, So. Karori, New

Zealand and Yakutsk all recorded this event with moderate to light
down motions. As usual the strongest reading was from So. Karori,
New Zealand. All these instruments were on the sun-lit hemisphere
at the time of the event. No instrument on the darkened hemisphere
recorded the event as far as I can tell at this time.

The CME arrival was followed quickly by a strong sudden commencement
geomagnetic storm. The storm started at 03:21 UT. Anti-solar areas
are within 20 degrees longitude of 50W; subsolar regions within
20 degrees of 130E. This includes most of the western Pacific
region and the eastern Caribbean Sea. These areas will be under
seismic watch conditions for the next two days. Larger associated events
are likely to occur from October 31-November 2.

At this writing, the storm was beginning to weaken rapidly
and is not expected to last through the rest of the day.

For seismograms see:
http://aslwww.cr.usgs.gov/Seismic_Data/heli2.htm

Three M-class solar flares were observed today with the following
parameters:

Flare # START MAX END CLASS

8020 + 0436 0450 0458 M1.3
8120 + 0950 1000 1005 M1.5
8260 + 1645 1651 1653 M1.4

Extensive activity in the southern California region was associated
in time with event 8260.

For general space weather conditions see:
http://sec.noaa.gov/today.html
For Solar flare data see:
http://sec.noaa.gov/ftpdir/indices/events/20011028events.txt

TROPICAL STORMS

Tropical Depression 14 continues to hang out over the central
North Atlantic Ocean. It is not expected to pose a threat to
communities or seismicity in North America. For Track-line data see:
http://www.wunderground.com/auto/HurricaneSite/tropical/tracking/at200114.html

Typhoon Podul has dissipated south of Kamchatka and is no longer
a threat to land or seismicity.

Tropical Cyclone Alex is located several thousand km south
of India and moving towards the southwest. It too, is not expected
to pose a threat at this time. For advisory see:

http://www.wunderground.com/auto/HurricaneSite/tropical/sp200101.public.html

TIDAL TRIGGERING (LUNAR)

Statistics have been done on many regions of the world in terms of
relationship of significant regional earthquakes with respect to lunar cycle.
Each report will summarize the most likely areas for tidal triggering
for the next day based on these statistics. It is expected
that tidal triggering will add an additional 0.5 - 1.0 units of
magnitude to events which are about to occur or will move these
events forward in time by up to seven days in the regions where
there is a statistical correlation between lunar phase and
earthquakes.

October 29 is thirteen days after the beginning the lunar month.
Regions most likely to experience tidal triggering on this day
(With associated magnitude ranges; the percent change in
seismicity rate over background seismicity rate on this
day of the lunar month; statistical z-value and
significance level) are:

Region Magnitude range %change z-value Significance level

Central America MB>=4.0 10 2.1 0.05
Global MB>=6.0 15 2.5 0.03
Utah MB>=0.0 14 2.7 0.03

Regions expected to experience reverse triggering (i.e. they are
unlikely to experience a significant event at this period of the
lunar cycle) are:

Region Magnitude range %change z-value Significance level

Central California MB>=2.0 -8 -2.2 0.05

EARTHQUAKE LISTINGS

GLOBAL

OCEANIA

O: 19OCT2001 11:51:31 7.7N 59.5E MB=4.4 QED CARLSBERG RIDGE

NEW ZEALAND

O: 28Oct2001 06:46 40.3S 175.0E ML=3.7 IGNS South of Wanganui, N.Z.
Note: (IGNS) Likely to have been felt in the Wanganui region.

O: 24OCT2001 17:48:08 42.1S 173.1E ML>3.0 QED SOUTH ISLAND, NEW ZEALAND.

O: 24OCT2001 16:19:47 37.3S 179.8W MB=4.2 QED EAST OF NORTH ISLAND, N.Z.

O: 22OCT2001 02:06:59 41.7S 174.6E MB=4.3 QED COOK STRAIT, NEW ZEALAND.
O: 22OCT2001 02:03:28 41.6S 174.4E MB=4.7 QED COOK STRAIT, NEW ZEALAND.
O: 24OCT2001 14:35:55 41.6S 174.4E MB=3.9 QED COOK STRAIT, NEW ZEALAND.

O: 24OCT2001 12:46:38 38.0S 176.1E ML>3.0 QED NORTH ISLAND, NEW ZEALAND.

O: 24OCT2001 10:58:47 39.8S 175.3E MB=3.7 QED NORTH ISLAND, NEW ZEALAND.

O: 24OCT2001 01:57:34 31.6S 178.1W MB=4.4 QED KERMADEC ISLANDS REGION
O: 23OCT2001 23:03:28 31.5S 177.9W MB=4.9 QED KERMADEC ISLANDS REGION

O: 23OCT2001 15:37:44 45.2S 166.8E MB=4.9 QED OFF W COAST OF S ISLAND, N.Z.
O: 23OCT2001 22:00:39 45.3S 166.8E MB=4.4 QED OFF W COAST OF S ISLAND, N.Z.

O: 24OCT2001 10:52:37 38.5S 176.0E ML>3.0 QED NORTH ISLAND, NEW ZEALAND.
O: 23OCT2001 19:38:37 38.6S 175.9E ML>3.0 QED NORTH ISLAND, NEW ZEALAND.

O: 23OCT2001 05:05:38 38.3S 176.8E MB=3.7 QED NORTH ISLAND, NEW ZEALAND.

O: 22OCT2001 15:58:39 37.2S 179.9W MB=4.3 QED EAST OF NORTH ISLAND, N.Z.
O: 22OCT2001 00:11:47 37.2S 179.9W MB=4.3 QED EAST OF NORTH ISLAND, N.Z.
O: 22OCT2001 02:46:33 36.9S 180.0W MB=4.7 QED EAST OF NORTH ISLAND, N.Z.
O: 21OCT2001 21:19:26 37.2S 179.9W MB=4.6 QED EAST OF NORTH ISLAND, N.Z.
O: 21OCT2001 14:30:47 37.2S 179.8W MB=4.5 QED EAST OF NORTH ISLAND, N.Z.
O: 21OCT2001 03:26:01 37.1S 179.9W MB=4.1 QED EAST OF NORTH ISLAND, N.Z.

O: 22OCT2001 01:28:58 37.1S 179.3E MB=5.0 QED OFF E COAST OF N ISLAND, N.Z.

O: 21OCT2001 23:18:43 38.5S 179.4E MB=4.3 QED OFF E COAST OF N ISLAND, N.Z.

O: 21OCT2001 15:42:05 37.5S 178.5E MB=4.0 QED OFF E COAST OF N ISLAND, N.Z.

O: 21OCT2001 10:25:45 38.1S 176.0E ML>3.0 QED NORTH ISLAND, NEW ZEALAND.

O: 21OCT2001 00:29:23 37.0S 179.0E MB=6.8 QED OFF E COAST OF N ISLAND, N.Z.

O: 19OCT2001 08:24:49 37.3S 177.6E ML>3.0 QED OFF E COAST OF N ISLAND, N.Z.

O: 18OCT2001 23:01:58 40.5S 176.2E MB=3.8 QED NORTH ISLAND, NEW ZEALAND.
O: 17OCT2001 16:50:03 40.1S 177.0E MB=3.7 QED OFF E COAST OF N ISLAND, N.Z.

O: 18OCT2001 09:31:38 36.4S 178.8E ML>3.0 QED OFF E COAST OF N ISLAND, N.Z.

O: 18OCT2001 01:21:20 37.1S 177.0E ML>3.0 QED OFF E COAST OF N ISLAND, N.Z.

O: 17OCT2001 20:02:41 44.5S 168.4E MB=4.6 QED SOUTH ISLAND, NEW ZEALAND.

O: 17OCT2001 19:25:37 38.0S 176.6E ML>3.0 QED NORTH ISLAND, NEW ZEALAND.

SOUTH PACIFIC ISLANDS

O: 28OCT2001 20:23:46 21.9S 176.6W Mb=5.7 NEIA FIJI ISLANDS REGION
O: 28OCT2001 20:23:46 21.1S 176.6W Mb=5.8 GSC FIJI ISLANDS REGION

O: 28OCT2001 17:22:38 4.6S 142.9E MB>4.5 GSSA NEW GUINEA, PAPUA NEW GUINEA

O: 26Oct2001 23:05:51 18.6S 168.1E MS=6.1 NEIS VANUATU ISLANDS

ASIA

O: 28OCT2001 03:24 36.4N 141.1E Mj=4.3 NIED E_OFF_IBARAKI_PREF, JAPAN

CENTRAL/SOUTH AMERICA

O: 28OCT2001 05:55:22 12.4N 87.1W MC=3.7 CASC NICARAGUA, C.A.
O: 28OCT2001 05:55:13 12.2N 87.7W MC=3.9 SIS NICARAGUA, C.A.

EUROPE

O: 28OCT2001 16:25:25 52.8N 0.6W Ml=4.3 CSEM UNITED KINGDOM
O: 28OCT2001 16:25:33 52.3N 1.0W ML=4.5 STR SUD ROYAUME UNI
O: 28OCT2001 16:25:24 52.8N 0.8W ML=3.8 BGS MELTON, ENGLAND
Note (BGS): BGS have been inundated with felt reports from the media, the
Police and residents of Lincolnshire, Leicestershire, Warwickshire
and Nottinghamshire of a felt event at approximately 16:25 UTC today. Felt
reports described "we ran into the street", "I was frightened", "I thought
a bomb had gone off "and "the whole street shook". BGS puts the
felt intensity at MMI V+.
Today's event locates approximately 40 km southeast of the magnitude 2.9 ML
Chesterfield earthquake, on 10 February 1997, that was felt with intensities
of 3 EMS and locates approximately 80 km northeast of the magnitude 4.2 ML
Warwick earthquake, on 23 September 2000, that was felt with intensities
of 5 EMS. This earthquake occurred about 2 minutes before the swarm
of events began in the Los Angeles CA area.

O: 28OCT2001 20:12:49 38.4N 37.9E ML=3.4 KAN MALATYA, TURKEY

U.S/CANADA

CALIFORNIA/NEVADA

O: 28OCT2001 16:40:18 33.4N 118.8W ML=1.2 SCSN ESE of Santa Barbara Is. , CA
O: 28OCT2001 12:11:36 33.4N 118.1W ML=1.9 SCSN ENE of Avalon, Catalina Isl, CA

O: 28Oct2001 17:21:45 33.9N 118.3W ML=2.8 NEIS SOUTHERN CALIFORNIA
O: 28Oct2001 16:29:54 33.9N 118.3W ML=3.0 NEIS SOUTHERN CALIFORNIA
O: 28Oct2001 16:27:45 33.9N 118.3W ML=3.7 NEIS SOUTHERN CALIFORNIA
O: 28OCT2001 20:16:31 33.9N 118.3W ML=1.9 SCSN E of Hawthorne, CA
O: 28OCT2001 16:48:44 33.9N 118.2W ML=1.5 SCSN NE of Compton, CA
O: 28OCT2001 15:42:40 33.9N 118.2W ML=1.5 SCSN N of Compton, CA
O: 28OCT2001 18:05:33 33.9N 118.3W ML=1.8 SCSN WNW of Compton, CA
O: 28OCT2001 15:36:20 33.9N 118.3W ML=1.8 SCSN ESE of Hawthorne, CA
O: 28OCT2001 16:37:16 33.9N 118.3W ML=2.2 SCSN E of Hawthorne, CA
O: 28OCT2001 16:51:04 33.9N 118.2W ML=1.7 SCSN NW of Compton, CA
O: 28OCT2001 17:13:41 33.9N 118.2W ML=1.5 SCSN NNW of Compton, CA
O: 28OCT2001 16:29:20 33.9N 118.3W ML=1.6 SCSN WNW of Compton, CA
O: 28OCT2001 15:53:37 33.9N 118.3W ML=1.8 SCSN E of Hawthorne, CA
O: 28OCT2001 15:43:51 33.9N 118.3W ML=1.8 SCSN E of Hawthorne, CA
O: 28OCT2001 15:31:07 33.9N 118.3W ML=1.8 SCSN NW of Compton, CA
O: 28OCT2001 16:09:37 33.9N 118.3W ML=1.4 SCSN NW of Compton, CA
O: 28OCT2001 15:29:54 33.9N 118.3W ML=3.0 SCSN SE of Inglewood, CA
O: 28OCT2001 15:39:27 33.9N 118.3W ML=2.6 SCSN SE of Inglewood, CA
O: 28OCT2001 16:42:24 33.9N 118.3W ML=1.7 SCSN SE of Inglewood, CA
O: 28OCT2001 16:54:27 33.9N 118.3W ML=1.6 SCSN E of Hawthorne, CA
O: 28OCT2001 19:00:55 33.9N 118.3W ML=1.6 SCSN NW of Compton, CA
O: 28OCT2001 16:12:46 33.9N 118.3W ML=1.9 SCSN E of Hawthorne, CA
O: 28OCT2001 16:21:45 33.9N 118.3W ML=2.8 SCSN SE of Inglewood, CA
O: 28OCT2001 17:05:40 33.9N 118.3W ML=2.4 SCSN E of Hawthorne, CA
O: 28OCT2001 15:53:05 33.9N 118.3W ML=1.6 SCSN NW of Compton, CA
O: 28OCT2001 15:27:45 33.9N 118.3W ML=3.7 SCSN NW of Compton, CA
O: 28OCT2001 15:44:26 33.9N 118.3W ML=2.0 SCSN SE of Inglewood, CA
O: 28OCT2001 16:23:51 33.9N 118.2W ML=1.5 SCSN NW of Compton, CA
O: 28OCT2001 15:48:43 33.9N 118.3W ML=1.7 SCSN ENE of Hawthorne, CA
O: 28OCT2001 15:33:00 33.9N 118.2W ML=1.5 SCSN SW of South Gate, CA

O: 28OCT2001 17:13:59 34.0N 118.3W ML=1.9 SCSN W of Inglewood, CA
O: 28OCT2001 15:51:56 34.0N 118.3W ML=1.4 SCSN E of Inglewood, CA
O: 28OCT2001 17:34:12 34.0N 118.3W ML=1.5 SCSN NE of Inglewood, CA
O: 28OCT2001 16:02:27 34.0N 118.4W ML=1.4 SCSN W of Culver City, CA
O: 28OCT2001 16:19:58 34.0N 118.4W ML=1.3 SCSN NW of Baldwin Hills, CA
O: 28OCT2001 16:46:14 34.1N 118.3W ML=1.3 SCSN S of Hollywood, CA
O: 28OCT2001 17:58:03 34.1N 118.3W ML=1.4 SCSN W of Silver Lake, CA

O: 28OCT2001 15:34:48 34.0N 118.7W ML=1.7 SCSN SSE of Malibu, CA

O: 28OCT2001 15:52:19 34.0N 118.1W ML=1.3 SCSN NNE of Downey, CA
O: 28OCT2001 15:51:29 34.0N 118.1W ML=1.6 SCSN SE of East Los Angeles, CA
O: 28OCT2001 19:16:59 34.0N 118.1W ML=1.4 SCSN S of Monterey Park, CA
O: 28OCT2001 15:48:26 34.1N 118.1W ML=1.8 SCSN WSW of Arcadia, CA
O: 28OCT2001 16:44:08 34.1N 118.2W ML=1.3 SCSN NE of Glendale, CA
O: 28OCT2001 17:02:28 34.2N 118.1W ML=1.6 SCSN E of Altadena, CA

O: 28OCT2001 17:13:13 34.3N 118.5W ML=1.4 SCSN S of Newhall, CA

O: 28OCT2001 15:53:33 36.0N 118.4W ML=2.2 NCSN NE of Pine Flat, CA
O: 28OCT2001 20:09:56 36.0N 118.4W ML=1.1 NCSN NE of Pine Flat, CA

O: 28OCT2001 11:41:40 36.4N 120.4W ML=2.3 NCSN ESE of New Idria, CA

O: 28OCT2001 18:48:14 36.7N 121.3W ML=1.8 NCSN S of Tres Pinos, CA

O: 28OCT2001 15:55:38 37.4N 118.8W ML=2.6 NCSN SW of Toms Place, CA

O: 28OCT2001 19:09:24 38.8N 122.9W ML=1.9 NCSN WNW of The Geysers, CA

O: 28OCT2001 18:15:53 40.3N 124.5W ML=2.6 NCSN NW of Punta Gorda, CA
O: 28OCT2001 12:28:01 40.5N 123.8W ML=2.5 NCSN E of Rio Dell, CA

O: 28OCT2001 8:45:04 39.3N 115.7W ML=2.2 NCSN N of Duckwater, NV

O: 28OCT2001 5:15:21 35.8N 118.4W ML=2.0 SCSN N of Lake Isabella, CA

O: 28OCT2001 4:32:43 36.5N 121.0W ML=1.5 NCSN SE of Pinnacles, CA

O: 28OCT2001 3:09:40 34.1N 116.7W ML=2.0 SCSN NW of Morongo Valley, CA

O: 28OCT2001 2:50:54 34.0N 117.0W ML=1.5 SCSN S of Yucaipa, CA

PACIFIC NORTHWEST/CANADA

O: 28OCT2001 8:26:59 47.7N 121.9W ML=2.3 PNSN NNW of Carnation, Wa

ROCKY MOUNTAIN AREA

O: 28OCT2001 13:00:15 44.7N 111.1W MD=0.1 MBMG YELLOWSTONE N.P WY
O: 28OCT2001 12:54:16 44.3N 110.8W MD=0.1 MBMG SOUTH YELLOWSTONE WY

EASTERN U.S./CANADA

ALASKA

O: 28Oct2001 17:58:27 51.6N 175.0W MB=5.2 NEIS ANDREANOF ISL, ALEUTIAN
O: 28OCT2001 17:58:32 52.4N 175.2W Ms=5.3 GSSC ANDREANOF ISLANDS, AL

O: 28OCT2001 12:30:58 55.9N 152.2W ML=3.9 AEIC SSW of Anchorage, Alaska