M5.5 earthquake 136 km WNW of Tobelo, Indonesia
A magnitude 5.5 earthquake struck 136 km WNW of Tobelo, Indonesia on Sun, Jun 21, 1987, 9:02 AM GMT+9 (00:02 UTC), 70 km (44 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (Mw, moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-06-21 00:02:46 UTC
- Depth
- 70.3 km (43.7 mi), intermediate-depth
- Epicenter
- 2.267° N, 126.908° E
- Region
- Indonesia
- 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 |
|---|---|---|---|
| 5.5 | Mw, moment | USGS National Earthquake Information Center | Preferred · Reviewed |
| 5.51 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.5 | 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.: 13S, 30C Centroid Location: Origin Time 00:02:53.7 0.4 Lat 2.40N 0.04 Lon 127.08E 0.04 Dep 64.2 3.5 Half-duration 2.2 Moment Tensor; Scale 10**17 Nm Mrr=-0.21 0.06 Mtt=1.51 0.09 Mff=-1.30 0.11 Mrt=-0.21 0.08 Mrf=-0.71 0.07 Mtf=1.57 0.08 Principal Axes: (T) Val=2.30 Plg=11 Azm=154 (N) Val=-0.13 Plg=70 Azm=32 (P) Val=-2.17 Plg=17 Azm=248 Best Double Couple:Mo=2.2*10**17 NP1:Strike=290 Dip=70 Slip=-4 NP2:Strike=22 Dip=86 Slip=-160
From the USGS event page for usp00035yd. 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 10 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.7144 km E of Laikit, Laikit II (Dimembe), Indonesia · 14349 days ago · 33 km deep · 96 km away
- 5.168 km W of Tobelo, Indonesia · 14346 days ago · 125 km deep · 79 km away
- 4.8168 km NW of Tobelo, Indonesia · 14331 days ago · 104 km deep · 52 km away
- 5.2171 km NW of Ternate, Indonesia · 14329 days ago · 33 km deep · 52 km away
- 4.8159 km NW of Ternate, Indonesia · 14328 days ago · 33 km deep · 59 km away
- 5.2168 km NW of Ternate, Indonesia · 14328 days ago · 77 km deep · 50 km away
- 4.771 km W of Tobelo, Indonesia · 14322 days ago · 33 km deep · 79 km away
- 4.4150 km NW of Tobelo, Indonesia · 14316 days ago · 33 km deep · 55 km away
- 5.083 km N of Ternate, Indonesia · 14311 days ago · 136 km deep · 92 km away
- 4.4155 km WNW of Tobelo, Indonesia · 14300 days ago · 33 km deep · 20 km away
Before
Earthquakes todayIndonesia earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00035yd (also filed as gcmtb062187a, gcmt19870621000244, iscgem464803). Read Sat, Oct 3, 2026, 8:19 PM UTC.