The red marker on the map shows the epicenter of the earthquake, the source of which was on the island of Mindanao, Philippines at a depth of 10 km, 53 km NE of Coronodal, 62 km SW of Davao and 998 km S-SE of Manila, the capital of the Philippines.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
06:11:47.0
|
6.68 |
125.21 |
10.0 |
63
|
6.8/32 |
6.5/35 |
9.5-10 |
51
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
06:12:11.9
|
7.34 |
124.81 |
160.0 |
21
|
|
6.0/15 |
3.5-4 |
95
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
06:11:53.6
|
6.72 |
125.13 |
30.0 |
481
|
Mw 6.8 |
|
|
14
|
CSEM European - Mediterranean seismological center
|
|
4
|
06:11:52.1
|
6.71 |
125.19 |
22.4 |
129
|
Mw 6.8 |
|
|
19
|
NEIC National Earthquakes Information Center of US Geological Service
|
Fig. 1 presents fragments of records obtained from digital stations Port Moresby (∆ 27.1º), Tennant Creek (∆ 27.9º), Taejon (∆ 29.6º), Matsushiro (∆ 32º), Vladivostok (∆ 36.8º). Fig. 2 presents fragments of records obtained from digital stations Stephens Creek (∆ 41.4º), Yuzhno-Sakhalinsk (∆ 41.4º), Ulaanbaatar (∆ 43.9º), Petropavlovsk (∆ 53.6º), Yakutsk (∆ 55.3º).
Image 1
Image 2
GS RAS registered 17 aftershocks with M> = 4.7 within the day after the main shock.
| N |
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
Region |
| 20194534
|
15/12/2019 06:32:22.0.0 |
6.7 |
125.34 |
10.0 |
30 |
|
5.2/21 |
5.5-6 |
Mindanao, Philippines
|
| 20194535
|
15/12/2019 07:09:18.0.0 |
6.53 |
125.38 |
10.0 |
55 |
|
6.0/30 |
7.5-8 |
Mindanao, Philippines
|
| 20194539
|
15/12/2019 07:18:08.0.0 |
6.84 |
125.41 |
10.0 |
30 |
|
5.2/20 |
5.5-6 |
Mindanao, Philippines
|
| 20194541
|
15/12/2019 07:33:52.0.0 |
6.7 |
125.3 |
10.0 |
20 |
|
4.9/13 |
5-5.5 |
Mindanao, Philippines
|
| 20194542
|
15/12/2019 07:49:50.0.0 |
6.71 |
125.12 |
10.0 |
29 |
|
5.2/18 |
5.5-6 |
Mindanao, Philippines
|
| 20194536
|
15/12/2019 07:53:40.0.0 |
6.68 |
125.45 |
10.0 |
34 |
|
5.2/23 |
5.5-6 |
Mindanao, Philippines
|
| 20194543
|
15/12/2019 07:56:44.0.0 |
6.72 |
125.45 |
10.0 |
18 |
|
5.0/12 |
5-5.5 |
Mindanao, Philippines
|
| 20194537
|
15/12/2019 08:51:06.0.0 |
6.55 |
125.44 |
10.0 |
19 |
|
5.0/14 |
5-5.5 |
Mindanao, Philippines
|
| 20194538
|
15/12/2019 08:55:10.0.0 |
6.71 |
125.4 |
10.0 |
31 |
|
5.1/18 |
5.5-6 |
Mindanao, Philippines
|
| 20194544
|
15/12/2019 11:15:32.0.0 |
6.52 |
125.07 |
10.0 |
25 |
|
5.0/13 |
5-5.5 |
Mindanao, Philippines
|
| 20194546
|
15/12/2019 12:38:50.0.0 |
6.49 |
125.15 |
10.0 |
48 |
|
5.5/26 |
6.5-7 |
Mindanao, Philippines
|
| 20194550
|
15/12/2019 16:06:15.0.0 |
6.49 |
125.26 |
10.0 |
16 |
|
4.8/8 |
4.5-5 |
Mindanao, Philippines
|
| 20194551
|
15/12/2019 16:11:42.0.0 |
6.45 |
125.25 |
10.0 |
20 |
|
4.9/12 |
5-5.5 |
Mindanao, Philippines
|
| 20194555
|
15/12/2019 18:16:42.0.0 |
6.46 |
125.48 |
10.0 |
14 |
|
4.9/9 |
5-5.5 |
Mindanao, Philippines
|
| 20194557
|
15/12/2019 18:24:04.0.0 |
6.71 |
125.44 |
10.0 |
21 |
|
4.9/10 |
5-5.5 |
Mindanao, Philippines
|
| 20194559
|
15/12/2019 19:02:00.0.0 |
6.66 |
125.18 |
10.0 |
24 |
|
4.9/17 |
5-5.5 |
Mindanao, Philippines
|
| 20194565
|
16/12/2019 02:34:34.0.0 |
6.52 |
125.05 |
10.0 |
14 |
|
4.7/7 |
4.5-5 |
Mindanao, Philippines
|
Focal mechanism solution of the origin of this earthquake was calculated by GS RAS with signs of initial arrivals of P waves at 53 stations, 28 of them registered compression waves (plus signs) and 25 stations registered tensile waves (minus signs). These stations are located in the interval of epicentral distances 6.3-88.6º and in azymuth sector Az=2-349º. The focal mechanism in stereographic projection on the lower hemisphere and the elements of the mechanism are presented in the table. The table also shows the focal mechanisms solutions obtained in USGS NEIC with W-phase Moment Tensor (Mww) technique and in Lamont-Dohert Earth Observatory of Columbia University, USA (LDEO GCMT) with СМТ (Centroid moment tensor) technique. The earthquake occurred under the action of close in value compression stresses oriented to the east (AZ=67-93º) according to GS RAS and LDEO GCMT and to the west (AZ=271º) according to USGS NEIC and tensile stresses oriented to the south (AZ=165-183º) according to GS RAS and LDEO GCMT and to th north (AZ=11º) according to USGS NEIC. The plane NP1 strikes NW (STK=299-319º), NP2 strikes S-SW (STK=202º) according to GS RAS, SW (STK=219º) according to LDEO GCMT and NE (STK=54º) according to USGS NEIC, both planes are inclined to the horizon rather steeply at close angles (DIP=56-82º). The type of motion along NP1 – left latteral slip with reverse fault component according to GS RAS, left latteral slip according to LDEO GCMT and left latteral slip with normal fault component according to USGS NEIC and right latteral slip along NP2. According to USGS NEIC Mo=1.772*10**19 N*m, Mww=6.8. According to LDEO GCMT Mo=1.58 *10**19 N*m, Mw=6.7
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 30
Azm: 165
|
PI: 14
Azm: 67
|
PI: 57
Azm: 315
|
Stk: 299
Dp: 80
Slip: 32
|
Stk: 202
Dp: 59
Slip: 168
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 17
Azm: 11
|
PI: 30
Azm: 271
|
PI: 55
Azm: 127
|
Stk: 319
Dp: 82
Slip: -34
|
Stk: 54
Dp: 56
Slip: -170
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 18
Azm: 183
|
PI: 0
Azm: 93
|
PI: 72
Azm: 1
|
Stk: 319
Dp: 78
Slip: 13
|
Stk: 226
Dp: 77
Slip: 168
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|