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Information message about a sensible earthquake in the Kemerovo region on September 19, 2024

A sensible earthquake (moderate at the epicenter on the SIS-17 scale) with M=4.5 occurred on September 19, 2024 at 17:01 GMT (20:01 Moscow Time) in the Tashtagolsky District of the Kemerovo Region.<br /> SIS-17 - Earthquakes. Seismic intensity scale. State Standard 57546–2017.

Parameters of the earthquake have been determined in the Alert Service (AS) of Information Processing Center (IPC) of Geophysical Survey of RAS in Obninsk with station data obtained from digital and analog seismic stations of Russia, countries of CIS and from abroad.

Preliminary processing has been done with data from 10 stations, accurate processing - with data from 28.

The red marker on the map is the epicenter of the earthquake, the origin of which was in the Tashtagol district of the Kemerovo region, at a depth of 10 km, 12 km NW of Sheregesh and 29 km N of Tashtagol.

	Time in origin (GMT)	Latitude, degree	Longitude, degree	Depth, km	Stations number	Ms/N	mb/N	I0 (calculated)	GAP	Center
1	17:01:29.0	53.02	87.94	10.0	29		4.5/8	5		GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
2	17:01:34.5	52.87	87.58	33.0	10		4.8/8	3-3.5		GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
3	17:01:29.1	52.98	88.12	10.0	61		4.4		43	CSEM European - Mediterranean seismological center
4	17:01:28.0	52.96	88.16	10.0	28		4.4/22		96	NEIC National Earthquakes Information Center of US Geological Service
5	17:01:27.5	53.21	87.9	10.0		ML 4.6		5.5-6		ASGSR Altay-Sayan Regional Seismological Centre, Novosibirsk, Geophysical Survey, Russian Academy of Sciences

Fig. 1 presents fragments of records obtained from digital stations Zalesovo (∆ 2.1º), Jazator (∆ 3.3º), Novosibirsk (∆ 3.3º), Kurchatov (∆ 6.2º), Orlik (∆ 7.2º). Fig. 2 presents fragments of records obtained from digital stations Mondy (∆ 8.1º), Zakamensk (∆ 9.9º), Borovoe (∆ 10.6º), Ala-Archa (∆ 13.7º), Arti (∆ 17.3º).

Image 1

Image 2

According to GS RAS the earthquake was felt in the settlements of Sheregesh and Tashtagol with a magnitude of 5 MSK.
Local Telegram channels are publishing photos and videos from eyewitnesses who report that as a result of the earthquake, plaster dropped down in some houses, cracks appeared in the walls, things fell and broke, and bottles fell off the shelves in stores.
Fig. 1 presents the map with Operative message obtained from Altai-Sayan branch of GS RAS containing theoretical isoseismals.

Image 1

Click here to view detailed macroseismic data (DyfitWeb service)

Focal mechanism solution of the origin was calculated by GS RAS with signs of initial arrivals of P waves at 31 stations, including 12 stations which registered compression waves (plus signs), and 19 stations which registered tensile waves (minus signs). The stations are located in the epicentral interval of 2-30º and azimuth sector Az=4-359º. Focal mechanism solution in stereographic projection on the lower hemisphere and elements of the mechanism are presented in the table. The earthquake occurred under slightly prevailing compression stresses oriented SE (AZ=125º). One nodal plane NP1 strikes NE (STK=43º), another plane NP2 strikes S-SW (STK=194º). NP2 plane is more horizontal (DP=21º) if compared with NP1 (DP=71º). The type of motion along NP1 is reverse fault, along NP2 - thrust.

Axes of main strengths			Nodal planes		Center
T	P	N	NP1	NP2	Center
PI: 63 Azm: 328	PI: 26 Azm: 125	PI: 9 Azm: 219	Stk: 43 Dp: 71 Slip: 100	Stk: 194 Dp: 21 Slip: 63	GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences

The earthquake occurred 14 km E-SE of the earthquake of December 18, 2023 with mb=4.5 which occurred in Kemerovo Region and felt with maximum intensity of 5–6 MSK in Sheregesh (according to Altai-Sayan branch of GS RAS);
and 160 km SE of the strong earthquake of August 12, 2021 which occurred in Kemerovo Region with magnitude M=5.0 and felt with maximum intensity of 4 MSK in Bolshaya Talda and Prokopyevsk;
and 180 km SE of Bachat earthquake of June 18, 2013 in Kemerovo Region with magnitude of M=5.2 felt with maximum intensity of 7 MSK in Bachatsk and Starobachaty. The destruction of furnaces, the collapse of chimneys, the crumbling of plaster and the formation of cracks in the walls of panel and brick buildings were observed in the villages closest to the epicenter.

Bibliography
Еманов А.Ф., Еманов А.А., Фатеев А.В., Лескова Е.В., Шевкунова Е.В., Подкорытова В.Г. Эпицентральная область Бачатского землетрясения 18.06.2013 г. с М=5.1 (Кузбасс) в 2013-2014 гг. // Землетрясения России в 2013 году. - 2015. - C. 103–108.