A CHICKEN OR EGG QUESTION ON FAR FIELD AFTERHOCKS ORIGINATION POINT

SUMMARY

An interesting question is being raised by the distribution of
the great Kunlun Mt. far-field aftershocks (FFA). In general,
it is expected that the strongest triggering around great earthquakes
will occur at the p- and s-wave shadow zone boundaries. When the
greatest moment (energy) release is coincident with the hypocenter,
there is no problem identifying the source of the energy, but
when the epicenter (the start of the rupture) is substantially
different from the location of greatest energy release as determined
by the moment tensor solution, the question arises regarding which location
to use in determining probability of subsequent FFA.
Such a case has arisen in the Kunlun Mountains great quake. The
location of rupture initiation appears to be substantially different
from the location on the fault where the most energy was released.
The epicentral data from NEIS gives the hypocentral parameters as:

O: 14NOV2001 09:26:10 35.9N 90.5E MS=8.0 NEIS QINGHAI, CHINA.

Whereas the moment tensor solution and distribution of aftershocks
from the Harvard determination gives the maximum moment at:

Source:
http://www.seismology.harvard.edu/CMTsearch.html

O: 14NOV2001 09:26:10 35.5N 92.8E MS=8.0 NEIS QINGHAI, CHINA.

Since there is more than 200 km separating these two locations,
the difference becomes important. In my opinion, the second (the
CMT solution) is the better to use in far-field studies since
it is really the distribution of energy from the source of energy
which is important here. The energy actually is smeared out over
the entire length of the rupture - in this case from 90E to 95E.
The difference became clear when viewing the largest or most
unusual earthquakes since the Kunlun event, many of which have
occurred near the shadow zone boundaries. Where EPID is the
distance from the NEIS epicenter and CMTD is the distance from
the CMT moment tensor solution, these include:
EPID CMTD

Central Mid-Atlantic Ridge (Nov 15; Mw 6.3) 104.0 105.9
Sevier Utah (Nov 19; Ml 3.8) 103.0 102.7
Macquarie Islands (Nov. 18, Mb 5.6) 109.2 107.5
Nelson N.Z. (Nov 17; Ml 4.8) 108.0 106.3
Ross N.Z. (Nov, 18, Ml 4.4) 107.5 105.9

This becomes important in making assessments of hazard related
to FFA. For example, using the NEIS epicenter, most of the New
Zealand earthquake zone falls just within the shadow zone, and
outside the region where strong FFA is expected, however, using
the CMT solution, the regions of New Zealand within the region
where FFA are expected. A warning would be made for New Zealand
using the CMT solution, but not using the NEIS solution. Since
the purpose of using FFA triggering to give a general warning
to areas where strong subsequent seismicity is expected, the difference
in using the CMT vs the PDE solutions is extremely important.

GLOBAL

Since last report, there have been five earthquake listed by NEIS
with Mb>=5. Two of these have been regional aftershocks for the
Kunlun Mts. earthquake (Mb 5.6, 5.6). The others have occurred in
Northern Colombia (Mb 5.3); the Kuril Islands (Mb 5.3) and the
South Sandwich Islands (Mb 5.0).
Other listed events with Mb<5 have occurred in Utah (Mb 3.6);
Kashmir (Ml 3.8); Guerrero, Mexico (Mb 4.3); the Andreanoff Isl. (Mb 4.2);
So. of Sumatera (SR 4.9); and the Fiji Islands (Mb 4.9).

U.S./CANADA

Two earthquakes have occurred in the New Madrid region since the
Kunlun mainshock, including a Ml 2.2 on Nov. 17 and s Ml 1.8 today
near Ridgely, TN. Also in the eastern U.S. an event of Ml 1.6 was
recorded about 6 km E of Blacksburg, VA yesterday. This is the first
event located in Virginia since October 1, 2001, and appears to be
an FFA at 106 degrees from the Kunlun earthquake. The area of Virginia
had been identified in the FFA forecast as a region where unusual
FFA might occur.
For epicentral details on SE U.S. quakes see:
http://folkworm.ceri.memphis.edu/recenteqs/Quakes/quakes0.html
The largest earthquake in the U.S./Canada region which was listed
today was a Ml 5.0 in the region of Kodiak, Alaska. No other
events of Ml>=3 were recorded in the Alaska region today, however
a Mb 4.2 was recorded last night in the Central Andreanoff Islands
region. Both these events may have been an FFA from the Kunlun Mts.
earthquake - the areas and distances had been identified as a regions where
strong FFA triggering was possible.
The largest earthquake in the 48 contiguous U.S. states today
occurred near Sevier, Utah this afternoon at the peak of C-class
solar flare #4790. It was followed by an aftershock of Ml 2.8.
This is the largest event within 50 km of this epicenter since
a Ml 4.1 on Feb. 23, 2001. There have been 12 events of Ml>=3.8
in this region since 1974, about one every two years. This earthquake
lies at 103 degrees - the edge of the p-wave shadow zone - from the great
Kunlun Mts. event where strong FFA triggering was expected and is
being observed. An Ml 2.6 also occurred near Emery, UT yesterday (Nov. 18).
Light activity continued in the Spokane and Mt. Rainier regions
of Washington state, but the strongest activity in the Northwestern
U.S/Western Canada region over the past several days has been occurring
in the Haines AL/Yukon Territory region starting with a Ml 4.2
yesterday. A Ml 2.6 also occurred near Ellensburg, WA on Saturday Nov. 16.
In the California/Nevada region, seismicity has been relatively
quiet today. The largest earthquakes of the day occurred in the
southland near the Yucca Valley area (Ml 2.7, 2.3 and 2.1) and in the Ocotillo
region (Ml 2.3). Two events have been listed since last report in
the Los Angeles/Santa Monica/Santa Barbara region - a Ml 2.0 near
the Los Angeles airport near Santa Monica; and a second Ml 2.1 last
night SW of Carpenteria, near Santa Barbara. In central and northern
California, conditions have been relatively quiet with only a Ml 2.2
near Mammoth Lakes since last report.

NEW ZEALAND

A moderate earthquake (Ms 5.6) was recorded yesterday south of
New Zealand in the Macquarie Islands region. This was the first
event of Mw>=5.5 in the general Macquarie Island area since July
15, 2000. Other earthquakes of Mw>=5.5 in the area in the past
4 years (since December, 1997) (55-65S 150-160E) have occurred
on March 14, 2000 (Mw 5.6); January 1, 2000 (Mw 6.0) and March
29, 1998 (Mw 6.3), so the interevent time between similar events
is about one year. This event occurred very near the edge of
the s-wave shadow zone - at 109 degrees from the great Kunlun
earthquake and is probably an FFA.

A number of moderate events continued to be recorded on the
IGNS on-line seismogram this morning. These appear to be similar
to those recorded last night. The parameters of these events
have not yet been published by IGNS.

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

GEOMAGNETIC/SOLAR FIELDS

A mild geomagnetic storm began this afternoon at 18:14 UT with
an increase in Hp (total geomagnetic field strength) of about
20%. This storm was not large of long enough to warrant a seismic
watch based on geomagnetic effects. The sub-solar and anti-solar
areas within 20 degrees longitude of 97W and 83E may experience
a rate or magnitude shift in the largest events of about 0.5 units
over the next day. Apparently no seismicity was associated with
the initiation of this storm.

No M- or X-class solar flares were recorded today, however several
C-class flares did occur in association with seismicity in the
western U.S. The parameters of these flares are:

FIRST LINE
Flare # START MAX END CLASS
SUCCEEDING LINES
EARTHQUAKES ASSOCIATED WITH FLARE

4780 + 1959 2009 2017 C3.6
O: 19NOV2001 20:00:49 32.8N 117.1W ML=1.6 SCSN NNW of La Mesa, CA

4790 + 2126 2134 2148 C1.7
O: 19NOV2001 21:43:49 38.5N 112.5W ML=2.8 UUSN WSW of Sevier, UT
O: 19NOV2001 21:36:25 38.5N 112.5W ML=3.7 UUSN WSW of Sevier, UT

4800 + 2316 2324 2331 C1.7
O: 19NOV2001 23:16:59 35.8N 118.0W ML=1.2 SCSN SSW of Coso Junction, CA

For general space weather conditions see:
http://sec.noaa.gov/today.html
For Solar flare data see:
http://sec.noaa.gov/ftpdir/indices/events/20011119events.txt

TROPICAL STORMS

No tropical storms were located in the Atlantic, eastern Pacific
or Indian oceans today.

Tropical depression 28w is currently NNW of Yap and moving
the NNW at about 6 knots. Some localized associated seismicity in
the region of Guam or the southern Mariana Islands may occur over the
next 24 hours. For a public advisory see:

http://www.wunderground.com/auto/HurricaneSite/tropical/wp200101.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.

November 20 is the sixth day after the beginning of 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

Indian Ocean MB>=4.0 17 2.1 0.05
Kamchatka MB>=4.0 35 2.6 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

Global MB>=6.0 -17 -2.8 0.02
West Pacific MB>=4.0 -20 -1.9 0.05
Yellowstone MB>=0.0 -19 -2.0 0.05
Puerto Rico MB>=4.0 -17 -1.9 0.05

EARTHQUAKE LISTINGS

GLOBAL

NEW ZEALAND

O: 17Nov2001 22:10:27 60.7S 153.9E MS=5.6 NEIS WEST OF MACQUARIE ISLAND
Note: This was the first event of Mw>=5.5 in the general Macquarie Island
area since July 15, 2000. Other earthquakes of Mw>=5.5 in the area in the
past 4 years (since December, 1997) (55-65S 150-160E) have occurred
on March 14, 2000 (Mw 5.6); January 1, 2000 (Mw 6.0) and March
29, 1998 (Mw 6.3), so the interevent time between similar events
is about one year. This event occurred very near the edge of
the s-wave shadow zone - at 109 degrees from the great Kunlun
earthquake and is probably an FFA as noted in the FFA forecast:

"***: The strongest triggering is always expected to be along the
shadow zone boundary between 103-107 degrees from the epicenter."

SOUTH PACIFIC ISLANDS

O: 17Nov2001 07:57:32 14.8S 167.5E MB=4.9 NEIS VANUATU ISLANDS

O: 17Nov2001 15:00:12 22.1S 169.3W MB=4.6 NEIS TONGA ISLANDS REGION
Note: This unusual event may be an Outer Rise earthquake. It may
also be an FFA from the Kunlun Mts. lying 109 degrees from that
location.

O: 18Nov2001 04:54:40 23.2S 179.4W MB=4.9 NEIS SOUTH OF FIJI ISLANDS
Note: This event is probably an FFA from the Great Kunlun earthquake.
It lies at 103 degrees from that event at a distance and in a region
where FFA were expected in the FFA forecast:

"The most likely events of Mw>=6 in the next 10 days appear to be:

Fiji/Tonga/Samoa area"

and

"103-107 degrees***: ...Tonga/Samoa"

ASIA

O: 19Nov2001 17:45:23 35.8N 93.6E MB=5.6 NEIS QINGHAI, CHINA
O: 18Nov2001 23:24:46 34.9N 94.0E MB=4.7 NEIS QINGHAI, CHINA
O: 18Nov2001 21:59:52 35.8N 93.7E MW=5.6 NEIS QINGHAI, CHINA

O: 17Nov2001 17:25:13 49.7N 155.1E MB=4.4 NEIS KURIL ISLANDS

O: 16NOV2001 20:34 34.6N 137.0E Mj=4.0 NIED MIKAWA_BAY_REGION, JAPAN

O: 16NOV2001 16:32 35.6N 140.2E Mj=4.5 NIED CENTRAL_CHIBA_PREF, JAPAN

O: 16NOV2001 14:22 37.0N 142.4E Mj=3.6 NIED E_OFF_FUKUSHIMA_PREF, JAPAN

O: 16NOV2001 01:52 31.2N 131.7E Mj=3.7 NIED SE_OFF_OSUMI_PEN, JAPAN

O: 18NOV2001 13:26:30 10.4S 117.6E SR=4.8 AEIC1 SUMBAWABESAR , INDONESIA

O: 18NOV2001 13:05:50 9.4S 114.8E SR=5.0 AEIC1 SW DENPASAR , INDONESIA
O: 18NOV2001 10:20:00 8.4S 115.2E SR=4.9 AEIC1 W BANGLI , INDONESIA

O: 18NOV2001 10:52:40 1.9N 98.0E SR=5.2 AEIC1 SOUTHERN SUMATERA
Note: This event lies at 35 degrees from the Great Kunlun Mt. earthquake
and is probably an FFA. It lies in an area where FFA was expected as per
the forecast:

"
The most likely events of M>=5 in the next 10 days on the
basis of history and far-field triggering theory appear to be:

Southern Sumatera"

O: 17Nov2001 20:49:08 9.0S 109.1E MB=4.9 NEIS SOUTH OF JAWA, INDONESIA

O: 17Nov2001 07:41:52 39.2N 69.6E MB>4.0 NEIS TAJIKISTAN

O: 17Nov2001 06:33:42 39.1N 51.5E MB=4.6 NEIS CASPIAN SEA

O: 18Nov2001 01:28:54 42.6N 74.1E MB=4.2 NEIS KYRGYZSTAN
O: 17Nov2001 14:24:44 41.9N 73.4E MB=4.7 NEIS KYRGYZSTAN
O: 17Nov2001 12:19:33 42.3N 73.7E HN=0.0 NEIS KYRGYZSTAN
O: 17Nov2001 01:49:48 43.7N 74.0E MB>4.0 NEIS CENTRAL KAZAKHSTAN

O: 15Nov2001 09:42:20 43.1N 47.2E MB=4.8 NEIS EASTERN CAUCASUS

O: 17Nov2001 12:14:46 30.4N 50.8E MB=4.9 NEIS NORTHERN AND CENTRAL IRAN

O: 17Nov2001 10:00:54 0.1N 123.1E MB=4.6 NEIS MINAHASSA PEN, SULAWESI

O: 18Nov2001 03:54:50 7.4S 102.7E MB>4.0 NEIS SW OF SUMATERA, INDONESIA

O: 18Nov2001 03:49:39 44.9N 148.1E MB=5.3 NEIS KURIL ISLANDS

O: 18Nov2001 03:07:44 37.7N 142.6E MB=4.5 NEIS OFF E COAST HONSHU, JAPAN

O: 18Nov2001 01:16:52 51.4N 159.7E MB=4.4 NEIS OFF E COAST OF KAMCHATKA

O: 18Nov2001 11:51:15 36.2N 70.3E MB=4.3 NEIS HINDU KUSH, AFGHANISTAN

O: 19Nov2001 15:14:19 35.1N 77.8E MB=3.8 NEIS EASTERN KASHMIR

CENTRAL/SOUTH AMERICA

O: 19Nov2001 13:48:14 16.8N 100.9W MB=4.3 NEIS NEAR COAST GUERRERO, MEX

O: 19NOV2001 17:09:38 16.9N 100.2W ML=4.0 SSN COSTA DE GUERRERO, MEXICO
O: 19NOV2001 16:59:43 16.9N 100.2W ML=4.2 SSN COSTA DE GUERRERO, MEXICO
O: 19NOV2001 15:03:43 17.0N 100.2W ML=4.4 SSN COSTA DE GUERRERO, MEXICO
O: 19NOV2001 09:21:28 17.0N 100.2W ML=3.9 SSN COSTA DE GUERRERO, MEXICO
O: 19NOV2001 09:04:53 16.9N 100.3W ML=3.7 SSN COSTA DE GUERRERO, MEXICO
O: 19NOV2001 05:14:43 17.1N 100.1W ML=3.5 SSN GUERRERO, MEXICO

O: 19NOV2001 13:48:17 17.1N 101.5W ML=4.7 SSN COSTA DE GUERRERO, MEXICO

O: 19NOV2001 02:10:55 16.3N 98.1W ML=4.1 SSN COSTA GUERRERO-OAXACA, MEXICO

O: 20NOV2001 00:31:50 11.3N 86.8W MC=3.5 SIS COSTA RICA, C.A.

O: 19NOV2001 21:04:05 9.7N 84.3W MC=4.2 CASC COSTA RICA, C.A.

O: 19NOV2001 01:32:23 10.9N 87.9W MC=3.8 SIS NICARAGUA, C.A.

O: 15NOV2001 14:13:30 10.4N 70.9W Mc=3.8 ULA Municipio Miranda, Edo. Zulia.

O: 16NOV2001 00:03:31 8.1N 75.7W Mc=4.7 ULA Dpto. Cordoba, Colombia.

O: 16NOV2001 09:04:58 7.3N 72.9W Mc=3.8 ULA Dpto. Santander, Colombia.

O: 18NOV2001 10:54:14 8.6N 71.1W Mc=1.4 ULA Santos Marquina, Venezuela

O: 18NOV2001 11:06:21 33.1S 70.3W ML=4.4 DGF NE of SANTIAGO, CHILE

O: 17Nov2001 16:30:54 3.4S 77.8W MB=5.2 NEIS PERU-ECUADOR BORDER REGION

O: 19NOV2001 21:01:26 6.9N 73.1W Mc=5.7 ULA Dpto. Santander, Colombia.
O: 19Nov2001 21:01:21 6.7N 73.1W MB=5.3 NEIS NORTHERN COLOMBIA
O: 18NOV2001 11:15:57 8.6N 71.1W Mc=1.3 ULA Santos Marquina, Venezuelada.
O: 19NOV2001 14:02:54 8.4N 71.0W Mc=2.5 ULA Pedraza, Edo. Barinas.

EUROPE

O: 16NOV2001 11:20:11 47.0N 0.9W ML=2.9 STR NNW POUZAUGES, FRANCE

O: 18NOV2001 08:38:40 35.9N 23.3E ML=3.6 NOA GREECE

O: 18NOV2001 14:14:03 34.9N 25.5E ML=3.7 NOA GREECE

O: 18NOV2001 17:20:36 39.3N 23.7E ML=3.4 NOA GREECE

O: 18NOV2001 20:27:39 38.1N 20.6E ML=3.6 NOA GREECE
O: 19NOV2001 04:21:27 38.0N 24.0E ML=3.5 NOA GREECE

OCEANIA

O: 17Nov2001 22:10:27 60.7S 153.9E MS=5.6 NEIS WEST OF MACQUARIE ISLAND

O: 17Nov2001 19:23:43 24.4S 115.9W MB=4.8 NEIS SOUTHERN EAST PACIFIC RISE
O: 17Nov2001 19:02:11 24.5S 115.9W MS=5.3 NEIS SOUTHERN EAST PACIFIC RISE

O: 18Nov2001 03:11:01 56.3S 25.0W MB=5.0 NEIS SOUTH SANDWICH ISL REGION
O: 18Nov2001 05:44:06 56.3S 25.0W MB>4.0 NEIS SOUTH SANDWICH ISL REGION

U.S/CANADA

CALIFORNIA/NEVADA

O: 19Nov2001 00:43:52 38.8N 122.8W ML=3.3 NEIS NORTHERN CALIFORNIA

O: 18Nov2001 19:47:21 37.2N 122.1W ML=3.3 NEIS CENTRAL CALIFORNIA

O: 18NOV2001 23:39:44 34.3N 119.6W MC=2.1 SCSN SW of Carpinteria, CA

O: 19NOV2001 09:58:02 32.3N 116.2W ML=2.8 SCSN SW of Ocotillo, CA

O: 19NOV2001 10:09:25 37.6N 118.8W ML=2.2 NCSN WNW of Toms Place, CA

O: 19NOV2001 9:31:25 33.9N 118.6W ML=2.0 SCSN SSE of Malibu, CA

O: 19NOV2001 7:52:28 39.8N 120.4W ML=2.4 NCSN E of Portola, CA

O: 19NOV2001 5:18:56 37.1N 121.9W ML=2.0 NCSN N of Aptos, CA

O: 19NOV2001 9:58:02 32.3N 116.3W ML=2.3 SCSN SSW of Ocotillo, CA

O: 19NOV2001 17:24:43 34.4N 116.2W ML=2.6 SCSN NNE of Joshua Tree, CA
O: 19NOV2001 16:45:32 34.4N 116.5W ML=2.2 SCSN N of Yucca Valley, CA

O: 19NOV2001 12:17:13 37.5N 118.8W ML=1.8 NCSN SW of Toms Place, CA
O: 19NOV2001 10:09:25 37.6N 118.8W ML=2.2 NCSN WNW of Toms Place, CA

PACIFIC NORTHWEST/CANADA

O: 18NOV2001 19:15:15 60.2N 137.9W ML=2.6 PGC SSW Haines Jct. YT
O: 18NOV2001 02:09:40 60.1N 137.9W ML=4.2 PGC SSW Haines Jct. YT

O: 18NOV2001 00:42:44 61.4N 139.9W ML=2.9 PGC WNW Haines Jct. YT
O: 16NOV2001 06:41:21 60.7N 140.5W ML=3.0 PGC W Haines Jct. YT

O: 18NOV2001 00:23:26 51.8N 130.9W ML=1.6 PGC SSE Sandspit BC

O: 17NOV2001 11:49:35 69.6N 143.1W ML=2.9 PGC ESE Prudhoe Bay AK

O: 17NOV2001 10:14:33 53.9N 133.4W ML=2.0 PGC W Massett BC

O: 17NOV2001 05:46:22 52.0N 126.1W ML=1.7 PGC SE Bella Coola BC

O: 16NOV2001 04:48:57 48.9N 129.1W ML=2.6 PGC W Tofino BC
O: 17NOV2001 06:34:59 50.0N 127.9W ML=0.7 PGC SSW Pt. Hardy BC

O: 18NOV2001 22:14:52 46.8N 121.8W ML=1.4 PNSN SSW of Mount Rainier

O: 18NOV2001 2:38:23 47.7N 120.1W ML=1.5 PNSN ENE of Entiat, WA

O: 17NOV2001 23:57:26 48.0N 122.6W ML=1.2 PNSN WNW of Everett, WA

O: 17NOV2001 3:13:04 46.9N 120.7W ML=2.6 PNSN SW of Ellensburg, WA

ROCKY MOUNTAIN AREA

O: 17NOV2001 16:52:12 36.9N 113.5W ML=1.6 UUSN SSE of Saint George, UT

O: 19NOV2001 21:43:49 38.5N 112.5W ML=2.8 UUSN WSW of Sevier, UT
O: 19NOV2001 21:36:25 38.5N 112.5W ML=3.8 UUSN WSW of Sevier, UT

O: 18NOV2001 9:56:18 38.9N 111.4W ML=2.6 UUSN W of Emery, UT

O: 17NOV2001 1:41:57 39.5N 111.2W ML=1.5 UUSN ESE of Mount Pleasant, UT
O: 16NOV2001 19:33:34 39.5N 111.2W ML=2.0 UUSN ESE of Mount Pleasant, UT

O: 17NOV2001 0:21:48 40.8N 111.9W ML=1.3 UUSN SSE of N. Salt Lake, UT

O: 16NOV2001 7:00:31 44.6N 110.4W ML=2.6 UUSN N of Fishing Bridge, WY
O: 17NOV2001 1:11:22 44.6N 110.4W ML=2.0 UUSN N of Fishing Bridge, WY
O: 17NOV2001 20:39:12 44.6N 110.7W ML=2.0 UUSN S of Norris Junc., WY

O: 20NOV2001 00:31:01 47.7N 113.8W MD=0.0 MBMG MONTANA

O: 20NOV2001 00:08:40 48.2N 115.4W MD=2.2 MBMG MONTANA

O: 19Nov2001 21:36:25 38.6N 112.5W ML=3.6 NEIS UTAH

O: 18NOV2001 11:27:01 47.2N 113.1W MD=0.8 MBMG MONTANA

O: 17NOV2001 04:56:40 47.7N 113.8W MD=0.0 MBMG MONTANA

EASTERN U.S./CANADA

O: 18NOV2001 17:15:45 37.2N 80.3W ML=1.6 CERI E of Blacksburg, VA
Note: This earthquake occurred at 107 degrees from the Great Kunlun
mountains mainshock at a distance and in an area where unusual FFA
were were expected. It is the first earthquake located in Virginia
since Oct 1, 2001 when a Ml 1.7 occurred near Blacksburg. For listing
see:
http://folkworm.ceri.memphis.edu/recenteqs/Quakes/quakes0.html

O: 19NOV2001 13:08:31 36.3N 89.5W ML=1.8 CERI NW of 29 Ridgely, TN
Note: This event could be an FFA from the Kunlun Mts. as it lies
at 108 degrees from that mainshock.

ALASKA

O: 19NOV2001 09:53:05 55.5N 152.5W ML=5.0 AEIC SSW of Anchorage, Alaska
Note: This may be a FFA from the Kunlun Mts. earthquake as it lies
73 degrees from that event in a region where FFA were expected as
noted in the FFA forecast:

"71-73 degrees: .. Unimak Isl, Alaska Peninsula"

O: 18Nov2001 18:55:17 51.0N 177.9W MB=4.2 NEIS ANDREANOF ISL, ALEUTIAN
Note: This may be a FFA from the Kunlun Mts. earthquake as it lies
63 degrees from that event in a region where FFA were expected as
noted in the FFA forecast:

"59-61 degrees: ... Central Aleutians"

and

"The most likely events of M>=5 in the next 10 days on the
basis of history and far-field triggering theory appear to be:

Central Andreanoff Islands"