M4.0 earthquake 102 km E of Ishinomaki, Japan
A magnitude 4.0 earthquake struck 102 km E of Ishinomaki, Japan on Sun, Aug 20, 2017, 9:55 AM JST (00:55 UTC), 41 km (26 mi) below the surface.
A larger quake followed: M4.8 33 km ESE of Ishinomaki, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-20 00:55:10 UTC
- Depth
- 41.3 km (25.6 mi), shallow
- Epicenter
- 38.363° N, 142.470° E
- Region
- Japan
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 7.7 km horizontally, 8.5 km in depth
- Magnitude uncertainty
- ±0.21
- Depth from
- From location
- Station coverage gap
- 154°
- Stations used
- 22
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.649 km SE of Kamaishi, Japan · 3331 days ago · 29 km deep · 70 km away
- 4.355 km ESE of ?funato, Japan · 3330 days ago · 54 km deep · 55 km away
- 4.357 km SE of Ishinomaki, Japan · 3312 days ago · 68 km deep · 75 km away
- 4.280 km SE of Ishinomaki, Japan · 3312 days ago · 42 km deep · 71 km away
- 4.3122 km ESE of Ishinomaki, Japan · 3307 days ago · 33 km deep · 45 km away
- 4.833 km ESE of Ishinomaki, Japan · 3283 days ago · 49 km deep · 71 km away · felt by 5
Before
- 4.172 km SE of ?funato, Japan · 3335 days ago · 45 km deep · 31 km away
- 4.434 km SE of ?funato, Japan · 3345 days ago · 52 km deep · 69 km away
- 4.346 km ESE of ?funato, Japan · 3346 days ago · 54 km deep · 63 km away
- 4.376 km ESE of ?funato, Japan · 3351 days ago · 35 km deep · 47 km away
- 4.329 km ESE of Ishinomaki, Japan · 3353 days ago · 49 km deep · 76 km away
- 4.351 km ESE of Ishinomaki, Japan · 3359 days ago · 54 km deep · 57 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000abbj. Read Mon, Oct 5, 2026, 3:04 AM UTC.