Information about sensitive earthquake in Stavropol Region on July 9, 2010

     The sensitive earthquake has occurred in Stavropol Region on July 9, 20109 at 18:39 GMT (22:39 Moscow time) with М=3.2.
     Preliminary processing has been done with data from 11 stations, accurate processing - with data 21 stations.
     Fig. 1 presents fragments of records obtained from digital stations Gofitzkoe (∆ 0.9º), Kislovodsk (∆ 1.1º) by three components. Fig. 2 presents fragments of records obtained from digital stations Neitrino (∆ 1.8º), Nalchik (∆ 1.9º), Sochi (∆ 2º), Lesken (∆ 2.2º), Digorie (∆ 2.4º), Anapa (∆ 3.1º).

Figure 1
 

Figure 2
 
     IPC GS RAS also has obtained information with parameters of this event from some seismological centers, these data are given in table 1:
Note: Сейсмический момент и моментная магнитуда получены по спектру S волны cейсмической станции Сочи, удаленной от эпицентра на 220 км. Сейсмический момент Мо=1.4*10**14 н*м
Table 1
NN Time in origin h-min-s (GMT) Lat degr. Lon degr. Depth km N s/st Ms/ N mb/ N I0 calc GAP Center
1 18-39-41.8 44.88 41.8  16  3.2/3 4-581 IPC GS RAS (Accurate)
2 18-39-43.2 44.93 41.76  10  11  3.2/3 4-4.5 71 IPC GS RAS (Preliminary)
3 18-39-41.8 44.88 41.8  16  3.2/3 4-581 IPC GS RAS (Accurate)
4 18-39-43.2 44.93 41.76  10  11  3.2/3 4-4.5 71 IPC GS RAS (Preliminary)
5 18-39-42.1 44.87 41.76  18  Mw 3.4 K 9.3  111 NCOB GSRAS
6 18-39-42.1 44.87 41.76  18  Mw 3.4 K 9.3  111 NCOB GSRAS
7 18-39-48.2 43.63 40.89  139   K 9.3   NORIPC
8 18-39-48.2 43.63 40.89  139   K 9.3   NORIPC
  • IPC GS RAS - Informational Processing Center, Geophysical Survey, Russian Academy of Sciences
  • NCOB GSRAS - Northern Caucasus operative bulletin of GS RAS
  • NORIPC - Regional Informational Processing Center of Severnaya Osetiya Geophysical Survey Russian Academy of Sciences
  • Epicenter
          Fig. 3 depicts with red star epicenter of this earthquake, which origin was located on the territory of Stavropol Region at the depth of 5 km, in 25 km S-W from Stavropol, 30 km N-W from Nevinnomisk, 85 km E-N-E from Labinsk.

    Figure 3
    Macroseismic manifestations
         In accordance with EMERCOM office in Rostov on Don this earthquake was felt in Stavropol and Nevinnomisk towns with intensities of 2-3 MSK.
    Historical records
         This earthquake has occurred on July 9 in the S-W part of Stavropol hill area in accordance with scheme of regional and neo tectonics zoning of South part of European Russia and adjacent territories [Dr. Makarov, 2006]. Rather strong and sensitive earthquakes were noticed in this area before (рис. 4). The most significant of them has occurred on October 2, 1971 with М=4.5, it had near the surface origin with intensity in epicenter of 8 MSK.

    Figure 4


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