M5.4 earthquake 210 km SE of Sarangani, Philippines
A magnitude 5.4 earthquake struck 210 km SE of Sarangani, Philippines on Thu, Jul 9, 1987, 12:31 PM GMT+8 (04:31 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.4 (Mw, moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-07-09 04:31:23 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 3.834° N, 126.542° E
- Region
- Philippines
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 5.4 | Mw, moment | USGS National Earthquake Information Center | Preferred · Reviewed |
| 5.32 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.3 | Mwc, centroid moment | Global CMT project | Preliminary |
What happened
The USGS’s account of the effects of this earthquake.
CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN L.P.B.: 14S, 32C Centroid Location: Origin Time 04:31:24.4 0.6 Lat 3.79N 0.06 Lon 126.86E 0.10 Dep 52.0 FIX Half-duration 1.9 Moment Tensor; Scale 10**17 Nm Mrr=0.39 0.07 Mtt=0.14 0.07 Mff=-0.54 0.13 Mrt=0.22 0.09 Mrf=1.06 0.07 Mtf=0.29 0.09 Principal Axes: (T) Val=1.20 Plg=52 Azm=300 (N) Val=0.04 Plg=18 Azm=186 (P) Val=-1.24 Plg=32 Azm=84 Best Double Couple:Mo=1.2*10**17 NP1:Strike=127 Dip=21 Slip=30 NP2:Strike=9 Dip=80 Slip=108
From the USGS event page for usp00036gf. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.4 and up: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 5.2184 km SE of Sarangani, Philippines · 14318 days ago · 81 km deep · 28 km away
- 5.1168 km SSE of Sarangani, Philippines · 14273 days ago · 170 km deep · 58 km away
- 4.6203 km NW of Tobelo, Indonesia · 14272 days ago · 33 km deep · 82 km away
- 4.4217 km NNW of Tobelo, Indonesia · 14272 days ago · 33 km deep · 68 km away
- 4.7205 km NW of Tobelo, Indonesia · 14272 days ago · 33 km deep · 80 km away
- 4.8203 km NW of Tobelo, Indonesia · 14271 days ago · 33 km deep · 82 km away
Before
- 5.6173 km SSE of Sarangani, Philippines · 14353 days ago · 136 km deep · 66 km away
- 4.9241 km NNW of Tobelo, Indonesia · 14358 days ago · 77 km deep · 43 km away
- 5.2245 km NW of Tobelo, Indonesia · 14359 days ago · 55 km deep · 39 km away
- 4.6246 km NW of Tobelo, Indonesia · 14359 days ago · 66 km deep · 40 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00036gf (also filed as gcmtb070987b, gcmt19870709043124, iscgem461680). Read Thu, Oct 1, 2026, 11:17 AM UTC.