Reported by USGS 175 days ago.
What the source measured
USGS reported: 35 km SW of Tamarindo, Costa Rica
How we know
One source: USGS. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 60% |
| Coordinates | 10.0938, -86.0843 |
| Timestamp | 2026-03-08T17:42:00.947Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us7000s308 |
Score Breakdown
Technical Details
| Mag | 4.5 |
| Sig | 312 |
| Depth | 10 |
| Tsunami | false |
| Emsc Mag | 4.1 |
| Emsc Auth | INET |
| Emsc Depth | -8 |
| Emsc Region | OFF COAST OF COSTA RICA |
| Emsc MagType | m |
| Emsc SourceId | 1957009 |
| MergedSources | [{"id":"emsc_20260308_0000273","source":"emsc","severity":"low","timestamp":1772991716000,"severityValue":24.599999999999998}] |
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 10 February 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.
Calamity.live data shows a earthquake event with CalamityScore 16/100, 35 km SW of Tamarindo, Costa Rica (Costa Rica), based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.