M6.7 earthquake 22 km SE of Manay, Philippines
A magnitude 6.7 earthquake struck 22 km SE of Manay, Philippines on Tue, May 12, 1987, 9:30 AM GMT+8 (01:30 UTC), 25 km (15 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 6.7 (Mw, moment), strong
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-05-12 01:30:25 UTC
- Depth
- 24.7 km (15.3 mi), shallow
- Epicenter
- 7.090° N, 126.701° E
- Region
- Philippines
- Strongest shaking
- VI, strong shaking
- 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 |
|---|---|---|---|
| 6.7 | Mw, moment | USGS National Earthquake Information Center | Preferred · Reviewed |
| 6.44 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 6.4 | Mwc, centroid moment | Global CMT project | Preliminary |
| 6.37 | Me, energy | Choy, USGS energy magnitude | Reviewed |
What happened
The USGS’s account of the effects of this earthquake.
Felt (II RF) at Cagayan de Oro. Also felt at Palo, Leyte. Depth from broadband displacement seismograms. FAULT PLANE SOLUTION: P-Waves NP1:Strike=330 Dip=67 Slip=90 NP2:Strike=150 Dip=23 Slip=90 Principal Axes: (T) Plg=68 Azm=240 (P) Plg=22 Azm=60 Comment: The focal mechanism is poorly controlled and corresponds to reverse faulting. The preferred fault plane is NP2. RADIATED ENERGY No. of sta: 7 Focal mech. F Energy 9.0+3.2*10**13 Nm MOMENT TENSOR SOLUTION Dep 31 No. of sta: 15 Moment Tensor; Scale 10**19 Nm Mrr=0.52 Mtt=-0.49 Mff=-0.03 Mrt=-0.61 Mrf=0.80 Mtf=0.32 Principal axes: (T) Val=1.16 Plg=57 Azm=247 (N) Val=0.03 Plg=13 Azm=136 (P) Val=-1.19 Plg=30 Azm=38 Best Double Couple:Mo=1.2*10**19 NP1:Strike=94 Dip=19 Slip=46 NP2:Strike=319 Dip=76 Slip=104 CENTROID, MOMENT TENSOR (HRV) Data Used: GDSN, IDA L.P.B.: 17S, 46C M.W.: 15S, 32C Centroid Location: Origin Time 01:30:30.0 0.2 Lat 7.10N 0.01 Lon 127.18E 0.01 Dep 35.8 0.9 Half-duration 6.0 Moment Tensor; Scale 10**18 Nm Mrr=2.98 0.04 Mtt=-0.25 0.03 Mff=-2.73 0.04 Mrt=-3.28 0.12 Mrf=3.10 0.11 Mtf=1.49 0.03 Principal Axes: (T) Val=5.50 Plg=60 Azm=210 (N) Val=0.10 Plg=12 Azm=321 (P) Val=-5.60 Plg=27 Azm=57 Best Double Couple:Mo=5.6*10**18 NP1:Strike=174 Dip=21 Slip=124 NP2:Strike=317 Dip=73 Slip=78
From the USGS event page for usp00034xs. U.S. Geological Survey text and figures are in the public domain.
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VI, strong shaking
- Peak ground acceleration
- 17.2% of gravity
- Peak ground velocity
- 2.9 cm/s
- Map
- Automatic
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 3.7 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.826 km ESE of Santiago, Philippines · 14390 days ago · 80 km deep · 18 km away
- 4.675 km ESE of Santiago, Philippines · 14389 days ago · 33 km deep · 56 km away
- 4.730 km ESE of San Ignacio, Philippines · 14372 days ago · 33 km deep · 13 km away
- 4.844 km E of Pondaguitan, Philippines · 14361 days ago · 33 km deep · 86 km away
- 4.922 km E of Santa Maria, Philippines · 14347 days ago · 77 km deep · 98 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00034xs (also filed as choy19870512013025, gcmtc051287a, gcmt19870512013026, atlas19870512013031, iscgem466724). Read Sun, Oct 4, 2026, 5:08 PM UTC.