Posted by Lowell on February 22, 2002 at 01:00:36:
SOLAR FLARES CONTINUE WHILE EUROPE IS SUB- and ANTI-SOLAR SUMMARY As occurred yesterday, two more M-4+ class solar flares occurred today. The first of these occurred while Central Europe was at noon (sub-solar), and the second occurred while Europe was anti-solar (local midnight). The unusually high seismicity that was experienced in Europe yesterday continued today as well. Earthquakes of Mb 4.8 (MAD) occurred in the Pyrennes, Spain; Mb 3.3 in Central Italy; and after the first flare Mb 3.8 in Central Italy and finally events of Mb 4.5 (IGNV) in Southern Greece this evening and of Ml 4.3 in Cyprus this morning. For details of these events see below or the EMSC web site at: http://www.emsc-csem.org/cgi-bin/ALERT_all_messages.sh?1 On the other side of the world at the international Date Line (180E) two Mb 5.0 earthquakes occurred in the Fiji Islands near the anti-solar longitude of the first flare. GLOBAL It was a day of moderately high seismicity around the globe today. Earthquakes of Mb>=4 have been listed for the southern (Mb 5.0) and northern (Mb 5.0) Fiji Islands. The largest earthquakes of the day were of Mb 5.2 in the Solomon Islands and in Argentina. Other activity occurred near Kamchatka (Mb 4.5); Peru (Mb 4.5); and the Mariana Islands (Mb 5.0). U.S./CANADA The largest event in the U.S./Canada region today was a Mb 3.7 in Southern Alaska. In California, the largest event was an apparently solar flare-triggered event of Ml 3.2 in the Calexico region of So. California. A Ml 2.7 also occurred in the Baldwin Hills area in the Los Angeles region. A Ml 2.9 also struck the Bishop, CA area this morning and was preceded by a Ml 2.5 north near Tonopah Junction, NV. A Ml 2.7 also hit near Viola, No. California this evening. In total, the California- Nevada region listed 9 events of Ml>=2 today, slightly more than has been usual in the past several months. Other areas of the U.S./Canada were quiet today, however a Ml 2.0 was recorded near Yakima, WA. NEW ZEALAND The IGNS on-line seismogram continued to show moderate regional seismicity throughout the day, however, IGSN did not issue any new earthquake reports today. The IGNS on-line Seismometer can be found at: http://www.gns.cri.nz/news/earthquakes/latest_drum.GEOMAGNETIC/SOLAR FIELDS The sun continued active today with several additional M-class solar flares. The largest of these flares occurred at noon and midnight UT and were most likely to have affected the sub- and anti-solar areas of Europe and Africa, as did the flares yesterday. There was no noticeable enhancement in the geomagnetic field, however SEC expects a moderate storm to occur tomorrow as the earth is struck by the solar wind from the M5.0 flare yesterday. The largest earthquake in California today occurred as a Ml 3.3 in the region of Calexico and was simultaneous with the maximum output of flare #7110 occurring at 18:27 UT. An event of 1.2 at Perris CA corresponded with the maximum of that flare as well at 18:23 UT. A small earthquake in the Tres Pinos area of central California accompanied the start of flare 7120. Flare # START MAX END CLASS 7050 + 1156 1226 1236 M3.9 7110 + 1807 1823 1844 M1.0 7120 + 2028 2037 2047 M1.4 7180 + 2349 0010 0027 M4.4 For general space weather conditions see: http://sec.noaa.gov/today.html For Solar flare data see: http://sec.noaa.gov/ftpdir/indices/events/20020221events.txt
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