Earthquakes 100 km ENE of Miyako, Japan — 97 people reported feeling this earthquake — CDI 5.8 (Moderate)
Right now
Nothing else has been detected within 20 km in the last 24 hours.
Reported by USGS 154 days ago.
It is the 3rd strongest of the 11 detections recorded within 20 km of this point since 20 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
USGS reported: 100 km ENE of Miyako, Japan — 97 people reported feeling this earthquake — CDI 5.8 (Moderate)
USGS recorded magnitude 7.4 at a depth of 35 km.
Nearby, since 20 April 2026
- April 20, 2026 · score 45 · 0.0 km
- June 16, 2026 · score 5 · 4.8 km
- May 8, 2026 · score 7 · 7.1 km
How we know
2 recorded sources include USGS; independence is not established by this count.
Our own score for this event is 40 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
| Type | Earthquakes |
| Severity | Critical |
| Calamity Score (ours) | 40 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 39.9532, 143.0462 |
| Nearest City | Miyako (100 km) |
| Urban exposure index (PEI) | 0 within 80 km |
| Impact Tier | minor |
| Timestamp | 2026-04-20T07:53:00.185Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us6000sri7/dyfi |
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_dyfi. Occurrence: 2026-04-20T07:53:00.185Z.
First archived: 2026-04-20T18:32:41.365Z. 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
Technical Details
| Mag | 7.4 |
| Depth | 35 |
| Felt | 97 |
| Cdi | 5.8 |
| CdiDescription | Moderate |
| Mmi | 6.21 |
| Alert | green |
| Sig | 899 |
| Tsunami | true |
| Place | 100 km ENE of Miyako, Japan |
| Types | ,dyfi,finite-fault,general-text,ground-failure,impact-link,losspager,moment-tensor,origin,phase-data,shakemap, |
| Usgs Shakemap Mag | 7.4 |
| Usgs Shakemap Depth | 35 |
| Usgs Shakemap Mmi | 6.21 |
| Usgs Shakemap MmiDescription | Strong |
| Usgs Shakemap Felt | 97 |
| Usgs Shakemap Alert | green |
| Usgs Shakemap Sig | 899 |
| Usgs Shakemap Tsunami | true |
| Usgs Shakemap Place | 100 km ENE of Miyako, Japan |
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.
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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