M4.8 earthquake 29 km S of Vas??n, Iran

A magnitude 4.8 earthquake struck 29 km S of Vas??n, Iran on Thu, May 12, 1977, 4:16 AM GMT+4:30 (23:46 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.8 47 km NW of Shahrak-e K?l?r?, Iran. This one was a foreshock.

Map

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

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
4.8	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed
5.24	Mw, moment	ISC-GEM global catalog	Final · ±0.2

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.8 and up: 11 in the 60 days after this one and 0 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp0000nuj (also filed as iscgem698401). Read Thu, Oct 1, 2026, 2:14 PM UTC.