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5.0

Off the Coast of Sanriku

· 6 days ago

Magnitude
5.0 MJ
Depth
10.0 km
UTC
1 Oct 2026, 17:17:20
Coordinates
39.900°N 143.200°E
Preferred source
Source: Japan Meteorological Agency website (jma.go.jp), processed by Deprem
Sources
JMA, USGS, EMSC, GFZ
Felt reports
0
Revision
Automatic solution
Nearest active fault
No mapped active fault within 50 kmGEM Global Active Faults (Styron & Pagani 2020), CC BY-SA 4.0

Expected intensity

Off the Coast of SanrikuNatural Earth
  • MMI II ≤ 186 km
  • MMI III ≤ 87 km
  • MMI IV ≤ 40 km
  • MMI V ≤ 18 km
  • MMI VI ≤ 0.5 km

Rings show the expected Modified Mercalli (MMI) intensity from the Akkar–Sandıkkaya–Bommer (2014) ground-motion model converted with Worden et al. (2012). Real shaking depends on soil and building.

Felt reports

No reports yet.

Did you feel it? Report

Source comparison

Latest solution of each source. Differences are to the preferred solution.

SourceMagnitudeTimeΔ timeDepthΔ locationPlace
EMSC5.1MW+20.5 s35.0 km9.5 kmOFF EAST COAST OF HONSHU, JAPAN
JMA ★5.0MJ—10.0 km—Off the Coast of Sanriku
USGS5.1MWW+20.1 s35.0 km3.4 km108 km ENE of Miyako, Japan
GFZ5.3MB+17.3 s10.0 km8.4 kmOff East Coast of Honshu, Japan
Revision history (6)
SourceMagnitudeTimeDepthCoordinatesReceived
EMSC5.1MW35.0 km39.878°N 143.173°E
EMSC5.3MB19.0 km39.932°N 142.985°E
EMSC5.3MB10.0 km39.899°N 143.101°E
EMSC5.2MB19.0 km39.941°N 142.987°E
EMSC5.2MB19.0 km40.001°N 143.054°E
GFZ5.2MB10.0 km39.858°N 143.271°E

Aftershock forecast

The chance of an aftershock of magnitude 4 or more in the next 7 days is 9%, and of magnitude 5 or more 1%.
The chance of an aftershock of magnitude 3 or more in the next 24 hours is 17%.
Magnitude1 day1 week1 month
M ≥ 317%≈ 0.2052%≈ 1.0373%≈ 2.42
M ≥ 42%≈ 0.029%≈ 0.1020%≈ 0.24
M ≥ 50.2%≈ <0.011%≈ 0.012%≈ 0.02
M ≥ 6<0.1%≈ 0.000.1%≈ <0.010.2%≈ <0.01

≈ expected number of aftershocks

1 aftershock recorded so far within 10 km (1 of M4.0 or more).

Computed: . Method: Reasenberg-Jones (generic, Bayesian a-value update); regime ANSR-SHALCON; generic parameters Page et al. (2016) via USGS OpenSHA GenericRJ_ParametersFetch.json. Probabilities are updated with the recorded aftershocks on every request. (b = 1, p = 0.98, c = 0.018 days, a = -2.087)

This is a statistical forecast, not an earthquake prediction. Actual aftershock activity can differ; follow local authorities for official statements.

Aftershocks

Earthquakes within 40 km of the epicentre in the first 30 days.

Count: 1