The red marker on the map is the epicenter of the earthquake, its origin was located on the northern coast of the island of Flores in the Indonesian province of East Nusa Tenggara at a depth of 10 km, 49 km NE of Banjawa, 50 km NW of Ende Timur, 156 km E of Labukhanbanjo.
|
Time in origin (GMT) |
Latitude, degree |
Longitude, degree |
Depth, km |
Stations number |
Ms/N |
mb/N |
I0 (calculated) |
GAP |
Center |
| 1
|
21:58:20.0
|
-8.5 |
121.31 |
10.0 |
58
|
7.4/48 |
6.9/42 |
10.5-11 |
69
|
GS RAS(Verified) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
2
|
21:58:36.7
|
-8.77 |
121.09 |
160.0 |
18
|
|
6.1 |
|
|
GS RAS(Preliminary) Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
3
|
21:58:24.1
|
-8.37 |
121.36 |
20.0 |
720
|
7.7 Mw |
6.6/327 |
|
12
|
CSEM European - Mediterranean seismological center
|
|
4
|
21:58:22.6
|
-8.31 |
121.35 |
0.0 |
107
|
7.7 Mw/92 |
6.8/263 |
|
36
|
NEIC National Earthquakes Information Center of US Geological Service
|
Fig. 1 presents fragments of records obtained from digital stations Kappang (∆ 3.8º), Davao City (∆ 16 º), Tennant Creek (∆ 17º), Port Moresby (∆ 25.5º), Kunigami (∆ 35.8º). Fig. 2 presents fragments of records obtained from digital stations Matsushiro (∆ 47.5º), Mys Shultsa (∆ 51.6º), Vladivostok (∆ 52.3º), Erimo (∆ 54.1º), Yuzhno-Sakhalinsk (∆ 58.4º).
Image 1
Image 2
GS RAS registered 18 aftershocks with М>=4.9 within 12.5 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 |
| 20263514
|
14/08/2026 22:13:49.0.0 |
-8.28 |
120.12 |
10.0 |
80 |
|
6.0/71 |
7.5-8 |
Flores region, Indonesia
|
| 20263515
|
14/08/2026 22:28:40.0.0 |
-8.01 |
121.79 |
10.0 |
49 |
|
6.2/39 |
8-8.5 |
Flores region, Indonesia
|
| 20263519
|
14/08/2026 22:37:18.0.0 |
-8.08 |
120.3 |
10.0 |
29 |
|
5.6/25 |
6.5-7 |
Flores region, Indonesia
|
| 20263516
|
14/08/2026 22:53:13.0.0 |
-8.13 |
120.17 |
10.0 |
52 |
|
5.5/33 |
6.5-7 |
Flores region, Indonesia
|
| 20263520
|
14/08/2026 23:12:31.0.0 |
-8.07 |
120.79 |
10.0 |
17 |
|
5.2/16 |
5.5-6 |
Flores region, Indonesia
|
| 20263521
|
14/08/2026 23:17:06.0.0 |
-8.27 |
121.6 |
10.0 |
13 |
|
5.1/12 |
5.5-6 |
Flores region, Indonesia
|
| 20263523
|
15/08/2026 01:17:20.0.0 |
-8.0 |
120.7 |
10.0 |
21 |
|
5.2/17 |
5.5-6 |
Flores region, Indonesia
|
| 20263524
|
15/08/2026 01:37:40.0.0 |
-8.17 |
120.28 |
10.0 |
27 |
|
5.2/25 |
5.5-6 |
Flores region, Indonesia
|
| 20263525
|
15/08/2026 02:18:48.0.0 |
-8.04 |
121.72 |
10.0 |
19 |
|
4.9/16 |
5-5.5 |
Flores region, Indonesia
|
| 20263526
|
15/08/2026 02:46:55.0.0 |
-8.27 |
121.49 |
10.0 |
20 |
|
5.1/15 |
5.5-6 |
Flores region, Indonesia
|
| 20263527
|
15/08/2026 03:54:14.0.0 |
-8.03 |
121.66 |
10.0 |
21 |
|
5.2/18 |
5.5-6 |
Flores region, Indonesia
|
| 20263539
|
15/08/2026 04:23:08.0.0 |
-8.42 |
121.37 |
10.0 |
19 |
|
5.0/10 |
5-5.5 |
Flores region, Indonesia
|
| 20263528
|
15/08/2026 05:45:07.0.0 |
-8.47 |
121.49 |
10.0 |
19 |
|
5.0/16 |
5-5.5 |
Flores region, Indonesia
|
| 20263529
|
15/08/2026 06:28:49.0.0 |
-8.46 |
121.48 |
10.0 |
21 |
|
5.1/19 |
5.5-6 |
Flores region, Indonesia
|
| 20263530
|
15/08/2026 06:43:06.0.0 |
-8.34 |
120.48 |
10.0 |
21 |
|
4.9/16 |
5-5.5 |
Flores region, Indonesia
|
| 20263531
|
15/08/2026 07:39:38.0.0 |
-8.02 |
120.94 |
10.0 |
26 |
|
5.1/23 |
5.5-6 |
Flores region, Indonesia
|
| 20263532
|
15/08/2026 09:32:53.0.0 |
-8.29 |
121.69 |
10.0 |
24 |
|
5.0/21 |
5-5.5 |
Flores region, Indonesia
|
| 20263546
|
15/08/2026 10:31:31.0.0 |
-8.15 |
120.48 |
10.0 |
17 |
|
5.3/15 |
6-6.5 |
Flores region, Indonesia
|
Focal mechanism solution of the origin was calculated by GS RAS with signs of initial arrivals of P waves at 88 stations, including 74 stations which registered compression waves (plus signs), and 14 stations which registered tensile waves (minus signs). The stations are located in the interval of epicentral distances 1-100 º and in azimuth sector Az=0-359º. 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 predominantly north-oriented compression stresses (AZ=0-8, 360º). One nodal plane NP1 strikes west (STK=267-279º), another plane NP2 strikes east (STK=90-97º). Both planes are dipping at the same angle (DP=45º) according to GS RAS, and NP2 is dipping more horizontally (DP=32-33º) if compared with NP1 (DP=58º) according to USGS NEIC and LDEO GCMT. The type of motion along both planes – reverse fault. The seismic moment according to USGS NEIC makes Mo=5.501 *10**20 N*m, Mww=7.8. According to LDEO GCMT it makes Mo=5.53*10**20 N*m, Mw=7.8.
| Axes of main strengths |
Nodal planes |
Center |
|
| T |
P |
N |
NP1 |
NP2 |
PI: 89
Azm: 278
|
PI: 0
Azm: 8
|
PI: 1
Azm: 98
|
Stk: 279
Dp: 45
Slip: 92
|
Stk: 97
Dp: 45
Slip: 88
|
GS RAS Federal research center, Geophysical survey of Russian Academy of Sciences
|
|
PI: 77
Azm: 179
|
PI: 13
Azm: 360
|
PI: 0
Azm: 270
|
Stk: 269
Dp: 58
Slip: 90
|
Stk: 90
Dp: 32
Slip: 90
|
NEIC National Earthquakes Information Center of US Geological Service
|
|
PI: 77
Azm: 165
|
PI: 13
Azm: 0
|
PI: 3
Azm: 269
|
Stk: 267
Dp: 58
Slip: 86
|
Stk: 94
Dp: 33
Slip: 96
|
GCMT Lamont-Doherty Earth Observatory Global CMT Columbia University, USA
|
|