CRISIS/MAP

FLASH REPORT · EQ

M5.4 earthquake — Northeastern Chiba Prefecture

Published Updated
JMA SHINDO 5-GDACS GREEN

An earthquake occurred at Northeastern Chiba Prefecture. JMA reports magnitude 5.4, a depth of 50 km, maximum observed intensity of Shindo 5-. GDACS currently provides a Green alert.

At a glance

Occurred
Oct 28, 2026, 15:07 UTC
Location
Northeastern Chiba Prefecture
Magnitude
JMA M5.4 · GDACS M5.5
Depth
JMA 50 km · GDACS 41 km
Maximum observed intensity
JMA Shindo 5-
GDACS alert
GREEN

Map

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Northeastern Chiba Prefecture The interactive map shows the source-reported event location when available.

What we know

OBSERVED SHAKING — JMA

Japan Meteorological Agency observations

Maximum observed seismic intensity: JMA Shindo 5-.

JMA magnitude: 5.4.

JMA depth: 50 km.

ESTIMATED IMPACT — GDACS

Global Disaster Alert and Coordination System

Current GDACS alert: Green.

Report history

  1. A newly associated source was added to the report; GDACS changed the alert to Green; GDACS revised event details; GDACS detailed geometry is no longer available in the current report.

  2. JMA revised earthquake measurements.

  3. The public report content was revised.

  4. Flash Report published from JMA earthquake information reporting maximum observed intensity of Shindo 5-.

Sources

CrisisMap presents source-labelled information and is not the original authority for these measurements.

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