EASTERN HONSHU, JAPAN
Geographic Context
This earthquake event occurred near Chiryū (approximately 4 km away) in Japan, situated along the Pacific Ring of Fire, one of the most seismically active zones on Earth. An estimated 948.3K people live within 20 km of the event location, placing this in the "significant" population impact tier.
Event Assessment
This event is a moderate earthquake measuring 5.1 on the magnitude scale. Events of this magnitude are typically felt over a wide area and may cause damage to vulnerable structures. Calamity.live has classified it as "medium" severity with a severity value of 40.8. The computed Calamity Score is 46 out of 100, reflecting a moderate-impact event. The primary scoring components are: population (85), historical (80), intensity (22). Data for this event was sourced from emsc, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
Japan has a documented history of earthquake events. Seismic monitoring in the region draws on data from multiple agencies including USGS, EMSC, and regional networks. Understanding local seismicity helps emergency management agencies plan for potential future events and assess building code adequacy. Earthquake hazard in any region depends on fault proximity, soil conditions, and building vulnerability — factors that can vary significantly even within a single metropolitan area.
Cascade Risk Analysis
This event may trigger secondary hazards through cascade effects. Cascade detection is an automated process that evaluates how primary disasters can trigger secondary events — for example, earthquakes triggering landslides, or volcanic eruptions causing lahars and pyroclastic flows. These secondary hazards can sometimes pose a greater threat than the initial event, particularly in mountainous terrain or densely populated areas.
Event Data
| Type | Earthquake |
| Severity | medium |
| Severity Value | 40.8 |
| Calamity Score | 46 / 100 |
| Confidence | 92% |
| Coordinates | 35.0200, 137.0600 |
| Nearest City | Chiryū (4 km) |
| Population Exposed | 948.3K within 20 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T19:21:36.000Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260813_0000312 |
Score Breakdown
Technical Details
| Mag | 5.1 |
| Depth | -267 |
| MagType | m |
| Region | EASTERN HONSHU, JAPAN |
| Auth | BMKG |
| SourceId | 2042359 |
Cascade Risks
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a earthquake event with CalamityScore 46/100, near Chiryū (Japan), based on data from emsc. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.