Indonesia earthquakes

M5.5 earthquake 248 km N of Tobelo, Indonesia

A magnitude 5.5 earthquake struck 248 km N of Tobelo, Indonesia on Tue, Apr 18, 2000, 3:08 AM GMT+9 (18:08 UTC), 57 km (35 mi) below the surface.

A larger quake followed: M6.3 264 km SE of Pondaguitan, Philippines. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 5.5 (Mwc, centroid moment), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Apr 18, 2000, 3:08 AM GMT+9
UTC: 2000-04-17 18:08:17 UTC
Depth: 56.6 km (35.2 mi), shallow
Epicenter: 3.959° N, 128.269° 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	Mwc, centroid moment	USGS National Earthquake Information Center	Preferred · Reviewed
5.48	Mw, moment	ISC-GEM global catalog	Final · ±0.1
5.5	Mwc, centroid moment	Global CMT project	Preliminary

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Oblique reverse
Nodal plane 1: Strike 160°, dip 23°, rake 50°
Nodal plane 2: Strike 23°, dip 73°, rake 105°

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 26 in the 60 days after this one and 7 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0009ref (also filed as gcmtb041700b, gcmt20000417180817, iscgem1734514). Read Thu, Oct 1, 2026, 11:22 PM UTC.