M4.7 earthquake 30 km ESE of Ishinomaki, Japan

A magnitude 4.7 earthquake struck 30 km ESE of Ishinomaki, Japan on Sun, Oct 16, 2016, 4:37 PM JST (07:37 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M6.9 35 km ESE of Namie, Japan. 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
4.7	Mww, W-phase moment	USGS National Earthquake Information Center	Preferred · Reviewed
4.6	Mwr, regional moment	USGS National Earthquake Information Center	Moment tensor · Reviewed

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

Felt (III) at Sendai. Also felt at Hitachi, Ishinomaki, Kitakami, Matsudo, Misawa, Naka, Natori, Tokyo and Tsuchiura. Recorded (4 JMA) in Miyagi.

From the USGS event page for us20007ei7. U.S. Geological Survey text and figures are in the public domain.

17 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

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

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.7 and up: 26 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 us20007ei7. Read Sat, Oct 3, 2026, 3:07 PM UTC.