Information message about the strong earthquake near east coast of Kamchatka, January 30, 2016 |
| The strong earthquake M=6.6 has occurred on January 30, 2016 at 03:25 GMT (06:25 Moscow time) near east coast of Kamchatka. |
| 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. Alert message on this earthquake has been delivered in 9 min after
registration to the Ministry of Emergency of the Russian Federation (EMERCOM). |
| Preliminary processing has been done with data from 71 stations, accurate processing - with data 80 stations. |
| Fig. 1 presents fragments of records obtained from digital stations Petropavlovsk (∆ 1º), Severo-Kurilsk (∆ 3.6º), Magadan (∆ 7.1º), Seimchan (∆ 9.5º), Kurilsk (∆ 11.1º). Fig. 2 presents fragments of records obtained from digital stations Bilibino (∆ 14.6º), Ussuriisk Group (∆ 40.5º), Tiksi (∆ 21.9º), Norilsk (∆ 34.7º), Zalesovo Group (∆ 41.5º). |
Figure 1
| 
Figure 2
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|
| IPC GS RAS also has obtained information with parameters of this event from some seismological centers, these data are given in table 1: |
| 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 |
03-25-07.5 |
53.87 |
158.78 |
170 |
80 |
6.6/43 | 7.1/36 | 5-6 | 46 | IPC GS RAS (Accurate) | | 2 |
03-25-08.6 |
53.97 |
158.52 |
165 |
71 |
| 7.2/24 | 5-6 | 53 | IPC GS RAS (Preliminary) | | 3 |
03-25-09.7 |
54.03 |
158.53 |
158 |
756 |
Mw 7.2 | | | 18 | CSEM | | 4 |
03-25-10.4 |
54.01 |
158.51 |
161 |
168 |
Mw 7.2 | | | 18 | NEIC | | 5 |
03-25-08.0 |
53.8 |
159.09 |
185 |
|
Ml 7.1 | | | | KRIPC | |
| IPC GS RAS - Informational Processing Center, Geophysical Survey, Russian Academy of Sciences |
| CSEM - European - Mediterranean seismological center |
| NEIC - National Earthquakes Information Center of US Geological Service |
| KRIPC - Regional Informational Processing Center of Kamchatka |
| Epicenter |
| Fig. 3 presents with red star the epicenter of this earthquake, its origin was located near east coast of Kamchatka, at a depth of 170 km, 61 km S-E of Pushchino, 80 km N-E of Elizovo, 93 km N-N-E of Petropavlovsk-Kamchatsky and 302 km S-W of the Kluchi. |
Figure 3 |
|
| Aftershock |
| Geophysical Survey registered 2 aftershocks with M=5.2 and M=4.5 in 4.5 hours and another one aftershock in 10.5 hours after the main shock. |
| N |
Date & Time (GMT)
yy-mm-dd hh:mm:sec |
Lat
degr. |
Lon
degr. |
Depth
km |
N
station |
Ms/ N |
mb/ N |
Io
calc. |
Region |
| 20160345 | 2016-01-30 03:42:21.0 | 53.84 | 158.39 | 160 | 24 | - | 5.2/ 8 | - | Near east coast of Kamchatka | | 20160347 | 2016-01-30 06:53:48.0 | 53.91 | 159.07 | 180 | 24 | - | 4.5/ 11 | - | Near east coast of Kamchatka | | 20160354 | 2016-01-30 13:56:00.0 | 54.07 | 158.5 | 160 | 15 | - | 4.0/ 6 | - | Kamchatka Peninsula, Russia | |
| Macroseismic manifestations |
| According to GS RAS this earthquake was felt in lighthouses Krugly and Vodopadny with intensity 5-6, in Petropavlovsk with intensity 4-5 and Severo-Kurilsk with intensity 3-4 MSK.
Information on individual responses is collected in the new section of the site, "You feel the earthquake? Tell us about it" (DyfitWeb). |
| Historical records |
| The earthquake M=7.3 has occurred on November 24, 1971 120 km S-S-E at the depth of 125 km, the earthquake M=6 has occurred on October 2, 2014 180 km S-W at the depth of 150 km. |
| Focal mechanism and seismic moment of the earthquake |
| Focal mechanism solution of this earthquake in stereograhpic projection at the lower hemisphere is presented at fig. 4, 5, it was obtained in USGS NEIC with W-phase Moment Tensor (Mww) technique and in Quick CMT Catalog Center, USA with CMT technique.
Both solutions obtained in various centers are close. This earhtquake has occurred under prevailing action of tensile stresses oriented to th south, compression stresses oriented to the nothe-west. Nodal plane NP1 in all solutions is nearly vertical (DP=72º), its strikes to the east (STK=76-79º), nodal plane NP2 is more flat (DP=35-40º), it strikes north-west (STK=322-324º). The type of motion for steeply dipping plane NP1 – normal fault with left latteral slip component, for NP2 – left latteral slip with normal fault component.
According to USGS NEIC – Mo=8.35*10**19 N*m, Mw=7.2; according to СМТ – Mo=8.49*10**19 N*m, Mw=7.2.
|
| Table 2 |
| Axes of main strengths |
Nodal planes |
Center |
| T |
P |
N |
NP1 |
NP2 |
| Pl |
Azm |
Pl |
Azm |
Pl |
Azm |
Stk |
Dp |
Slip |
Stk |
Dp |
Slip |
| 21 | 192 | 52 | 313 |
29 | 90 | 79 | 72 | -121 | 323 |
35 | -32 | NEIC | | 19 | 192 | 49 | 306 |
34 | 89 | 76 | 72 | -126 | 324 |
40 | -28 | Quick CMT | |
| NEIC - National Earthquakes Information Center of US Geological Service |
| Quick CMT - Quick CMT catalog |
Figure 4 | 
Figure 5 |
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