Right now
The most recent data we hold from EMSC arrived 42 minutes ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by EMSC today.
It is the only one we have recorded within 20 km of this point since 4 October 2026.
What the source measured
EMSC reported: OFF COAST OF COSTA RICA
EMSC recorded magnitude 4.0 at a depth of 1 km.
The seismic region given by the source is OFF COAST OF COSTA RICA.
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 0 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquake |
| Severity | Low |
| Calamity Score (ours) | 0 / 100 |
| Legacy data-support index | 0.64/1 |
| Coordinates | 7.8371, -83.1487 |
| Nearest City | La Concepción (96 km) |
| Urban exposure index (PEI) | 0 within 30 km |
| Impact Tier | minor |
| Timestamp | 2026-10-04T00:06:48.000Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20261004_0000003 |
Physical priority index · v5. 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: emsc. Occurrence: 2026-10-04T00:06:48.000Z.
First archived: 2026-10-04T00:17:55.736Z. Material modification: 2026-10-04T01:21:03.039Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-10-04T01:21:03.039Z · data_change
Index 1 → 0.
11 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score Breakdown
Technical Details
| Mag | 4 |
| Depth | 1 |
| MagType | m |
| Region | OFF COAST OF COSTA RICA |
| Auth | UNA |
| SourceId | 2069153 |
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.
Review the area, threshold and delivery channel in your account.