The red marker on the map is the epicenter of the earthquake, which was located on the northeast coast of Cebu Island, Philippines at a depth of 10 km, 6 km NE of Bogo, 87 km N-NE of Cebu and 515 km 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
|
13:59:44.0
|
11.09 |
124.04 |
10.0 |
57
|
6.9/43 |
6.8/44 |
9.5-10 |
128
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
13:59:44.1
|
11.14 |
123.97 |
10.0 |
10
|
|
6.2/10 |
|
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
13:59:45.4
|
11.14 |
124.17 |
14.5 |
575
|
Mw 6.9 |
6.6/286 |
|
21
|
CSEM European - Mediterranean seismological center
|
|
4
|
13:59:43.4
|
11.15 |
124.14 |
10.0 |
157
|
Mw 6.9 |
|
|
28
|
NEIC National Earthquakes Information Center of US Geological Service
|
Fig. 1 presents fragments of records obtained from digital stations Kunigami (∆ 16.2º), Mys Shultsa (∆ 32º), Vladivostok (∆ 22.6º), Ussuriysk (∆ 33.7º), Kamikawa-asahi (∆ 36.6º). Fig. 2 presents fragments of records obtained from digital stations Yakutsk (∆ 51º), Magadan (∆ 52.4º), Tiksi (∆ 60.6º), Bilibino (∆ 63.3º), Kislovodsk (∆ 76.2º).
Image 1
Image 2
GS RAS registered 8 aftershocks with M>=4.7 within 6 hours after the main shock.
| N |
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
Region |
| 20255685
|
30/09/2025 14:12:58.0.0 |
11.1 |
124.1 |
10.0 |
25 |
|
5.4/23 |
6-6.5 |
Leyte, Philippines
|
| 20255687
|
30/09/2025 14:17:10.0.0 |
11.05 |
124.29 |
10.0 |
14 |
|
4.9/12 |
5-5.5 |
Leyte, Philippines
|
| 20255689
|
30/09/2025 14:33:00.0.0 |
10.94 |
124.1 |
10.0 |
30 |
|
5.1/23 |
5.5-6 |
Leyte, Philippines
|
| 20255690
|
30/09/2025 14:39:39.0.0 |
11.01 |
124.0 |
10.0 |
32 |
|
5.2/29 |
5.5-6 |
Leyte, Philippines
|
| 20255691
|
30/09/2025 16:01:52.0.0 |
10.78 |
123.86 |
10.0 |
31 |
|
4.8/24 |
4.5-5 |
Cebu, Philippines
|
| 20255692
|
30/09/2025 16:34:32.0.0 |
11.04 |
124.13 |
10.0 |
33 |
|
5.3/29 |
6-6.5 |
Leyte, Philippines
|
| 20255694
|
30/09/2025 18:40:04.0.0 |
11.2 |
124.2 |
10.0 |
24 |
|
4.7/23 |
4.5-5 |
Leyte, Philippines
|
| 20255695
|
30/09/2025 19:30:29.0.0 |
11.16 |
124.07 |
10.0 |
27 |
|
4.8/23 |
4.5-5 |
Leyte, Philippines
|
Focal mechanism solution of the origin was calculated by GS RAS with signs of initial arrivals of P waves at 101 stations, including 66 stations which registered compression waves (plus signs), and 35 stations which registered tensile waves (minus signs). The stations are located in the interval of epicentral distances 4.3-90º and in azimuth sector Az=1-357º. Focal mechanism solution in stereographic projection on the lower hemisphere and elements of the mechanism are presented in the table. The table also contains focal mechanism solutions obtained at the USGS NEIC with WW-phase Moment Tensor (Mww) technique and in Lamont-Dohert Earth Observatory of Columbia University, USA (LDEO GCMT) with СМТ (Centroid moment tensor) technique. Solutions from different centers are close. The earthquake was caused by similar compressive stresses oriented to the east (AZ=89-99º) and tensile stresses oriented north (AZ=359, 7º). One nodal plane NP1 strikes SE (STK=135-145) another plane NP2 strikes NE (STK=44-52º), both planes are dipping rather steeply to the horizon with close angles (DIP=70-88º). The type of motion along NP1 – left lateral slip, along NP2 – right lateral slip. The seismic moment of the earthquake was obtained by GS RAS from the spectra of longitudinal waves registered at the station "Talaya" (∆ 43.8º), it makes Mo=1.744*10**19 N*m, Mw=6.8. The seismic moment according to USGS NEIC makes Mo=2.554 *10**19 N*m, Mww=6.87. According to LDEO GCMT it makes Mo= 2.45*10**20 N*m, Mw=6.9.
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 11
Azm: 359
|
PI: 0
Azm: 89
|
PI: 79
Azm: 179
|
Stk: 135
Dp: 82
Slip: 8
|
Stk: 44
Dp: 82
Slip: 172
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 22
Azm: 7
|
PI: 6
Azm: 99
|
PI: 67
Azm: 203
|
Stk: 145
Dp: 70
Slip: 12
|
Stk: 51
Dp: 79
Slip: 160
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 6
Azm: 7
|
PI: 3
Azm: 98
|
PI: 83
Azm: 215
|
Stk: 143
Dp: 83
Slip: 2
|
Stk: 52
Dp: 88
Slip: 173
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|