Calamity
LowEarthquakesCS: 6 · v1

Earthquakes in Izu Islands, Japan Region

JapanUSGS

Right now

The most recent data we hold from USGS arrived 12 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.

Nothing else has been detected within 20 km in the last 24 hours.

Reported by USGS 90 days ago.

It is the only one we have recorded within 20 km of this point since 16 June 2026.

What the source measured

USGS reported: Izu Islands, Japan region

USGS recorded magnitude 4.7 at a depth of 10 km.

How we know

2 recorded sources include USGS; independence is not established by this count.

Our own score for this event is 6 out of 100.

This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.

Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.

Event Data

TypeEarthquakes
SeverityLow
Calamity Score (ours)6 / 100
Legacy data-support index0.67/1
Coordinates32.4153, 142.0533
Timestamp2026-06-16T02:52:22.559Z
Sourcehttps://earthquake.usgs.gov/earthquakes/eventpage/us7000st94

Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.

Source and revision timeline

Source: usgs. Occurrence: 2026-06-16T02:52:22.559Z.

First archived: 2026-06-16T14:50:23.700Z. Material modification: not recorded.

Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.

Score Breakdown

14
intensity
0
Urban PEI term
0
Scenario weight
7
Recorded reference / batch anomaly

Technical Details

Mag4.7
Depth10
Tsunamifalse
Sig340
Emsc Mag4.7
Emsc Depth10
Emsc MagTypemb
Emsc RegionIZU ISLANDS, JAPAN REGION
Emsc AuthEMSC
Emsc SourceId2011513
MergedSources[{"id":"emsc_20260616_0000063","source":"emsc","severity":"low","severityValue":28.200000000000003,"timestamp":1781578343480,"latitude":32.4171,"longitude":141.9145}]

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.

Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.

This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.

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