M3.4 earthquake 13 km ENE of Astypálaia, Greece

A magnitude 3.4 earthquake struck 13 km ENE of Astypálaia, Greece on Mon, Jul 28, 2003, 10:04 PM GMT+3 (19:04 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.3 13 km SSW of Kéfalos, Greece. This one was a foreshock.

Map

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

The USGS’s account of the effects of this earthquake.

no people dead or missing; no people injured; no buildings damaged or destroyed

From the USGS event page for usp000c3kw. U.S. Geological Survey text and figures are in the public domain.

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 1.5 and up: 18 in the 60 days after this one and 4 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp000c3kw. Read Fri, Oct 2, 2026, 6:04 PM UTC.