Skip to content
Deprem

Magnitude 4.1 earthquake · MJOff the Coast of Fukushima Prefecture

IIExpected intensity: Very weak: only at rest, on upper floors
When
3 days ago
Depth
60.0 km
From you
Source
Source: Japan Meteorological Agency website (jma.go.jp), processed by Deprem
Automatic
Did you feel it? Report

Expected intensity

Off the Coast of Fukushima PrefectureNatural Earth
  • MMI II ≤ 35 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.

Aftershocks

Earthquakes within 20 km of the epicentre in the first 30 days.

No aftershocks recorded yet.

Aftershock forecast

The chance of an aftershock of magnitude 4 or more in the next 7 days is 1%, and of magnitude 5 or more 0.1%.
The chance of an aftershock of magnitude 3 or more in the next 24 hours is 2%.
Magnitude1 day1 week1 month
M ≥ 32%≈ 0.029%≈ 0.1117%≈ 0.21
M ≥ 40.2%≈ <0.011%≈ 0.012%≈ 0.02
M ≥ 5<0.1%≈ 0.000.1%≈ <0.010.2%≈ <0.01
M ≥ 60%≈ 0.00<0.1%≈ 0.00<0.1%≈ 0.00

≈ expected number of aftershocks

0 aftershocks recorded so far within 10 km (0 of M3.1 or more).

Computed: . Method: Reasenberg-Jones (generic, Bayesian a-value update); regime ANSR-DEEPCON; 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 = -2.373)

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

Felt reports

No reports yet.

Source comparison

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

SourceMagnitudeTimeΔ timeDepthΔ locationPlace
EMSC4.5MB+42.3 s60.0 km6.1 kmNEAR EAST COAST OF HONSHU, JAPAN
USGS4.5MB+42.0 s52.7 km16.9 km37 km ESE of Iwaki, Japan
JMA ★4.1MJ—60.0 km—Off the Coast of Fukushima Prefecture
Revision history (3)
SourceMagnitudeTimeDepthCoordinatesReceived
EMSC4.5MB52.7 km36.950°N 141.280°E
EMSC4.1M52.7 km36.950°N 141.280°E
EMSC4.1M60.0 km37.000°N 141.100°E