Seismic Event Dossier03:01 Local (16:01 UTC)(just now)
54.49°N, 160.47°E
USGS•#official19230203160150_30reviewed

Earthquake near Kamchatka, Russia

A magnitude 8.4 (MW) earthquake occurred on 1923-02-03, 03:01 local time (16:01 UTC) (just now), centered 200 km NE of Petropavlovsk-Kamchatsky (Russia). The hypocenter was located at a shallow depth of 15 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.

Historical Landmark Earthquake

#41 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes
Magnitude 8.4 historical earthquake occurring on 1923-02-03 in Russia. Associated with the Unnamed Fault (Active Fault). Documented casualties: > 1,000.
Documented Fatalities> 1,000
Fault KinematicsActive Fault
Equivalent Energy60.04 Mt TNT

Magnitude

MW
M 8.4

60.04 Mt TNT

Depth

15 km
15 km

shallow (Shallow crustal)

PAGER Impact

red
> 1,000 fatalities

Injuries: > 5,000 · ~1.3M felt

Interactive Epicenter & Fault Map

Fault5 km
Unnamed Fault
Active Fault · ~~15.0 mm/yr
Felt byMMI V+
~1.3M exposed
~1M in strong shaking
Primary SolutionUSGS
USGS#official19230203160150_30reviewed
1 agencies reporting
Geological Setting54.5°N
Kamchatka & Kuril-Kamchatka Trench
Continental / Inland crustal

Seismic Activity & Aftershock Sequence

Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.

M0.0M4.5M9.0100%50%0%MainshockFeb 2Feb 7Feb 12Feb 17Feb 22Feb 27M8.4
Hover or tap a point to inspect aftershocks and risk probability curve.
<35 km (Shallow)35–70 km (Intermediate)>70 km (Deep)Mainshock
ML Risk Forecast:12h38%24h52%72h67%7d83%

Where it was felt

1 settlements

Shaking intensity is modelled from magnitude, depth and distance (GMPE attenuation), not reported by residents.

TownDistanceIntensity
Petropavlovsk-Kamchatsky · Kamchatka200 kmMMI VIII

Readings by agency

1 sources

Independent solutions for the same rupture. Differences of 0.1–0.3 in magnitude are normal and reflect method and station coverage.

AgencySource IDMagnitudeDepthEpicenter
USGS
Primary
official19230203160150_30M 8.415 km54.49, 160.47

Tectonic setting

Nearest mapped active fault: Unnamed Fault, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).

Regional Seismic Profile

Kamchatka & Kuril-Kamchatka Trench

View live seismic monitoring, historical danger benchmarks, fault slip models and recurrence intervals for this zone.