M 6.1 Earthquake — ShakeMap MMI 4.3
93 km NNE of Hihifo, Tonga — Light shaking (MMI 4.3)
Geographic Context
This earthquake event occurred near Apia (approximately 245 km away) in Samoa, an area that experiences a range of natural hazards.
Event Assessment
This event is a strong earthquake of magnitude 6.1, powerful enough to cause significant structural damage in the epicentral region. The hypocenter was located at a depth of 36 km. Calamity.live has classified it as "high" severity with a severity value of 61. The computed Calamity Score is 25 out of 100, suggesting contained impact at this time. The primary scoring components are: historical (80), intensity (42). Data for this event was sourced from usgs_shakemap, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
Samoa 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.
Event Data
| Type | Earthquake |
| Severity | high |
| Severity Value | 61 |
| Calamity Score | 25 / 100 |
| Confidence | 55% |
| Coordinates | -15.1256, -173.6164 |
| Nearest City | Apia (245 km) |
| Impact Tier | minor |
| Timestamp | 2026-04-19T17:34:47.472Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us6000sred/shakemap |
Score Breakdown
Technical Details
| Mag | 6.1 |
| Depth | 36 |
| Mmi | 4.303 |
| MmiDescription | Light |
| Felt | 13 |
| Alert | green |
| Sig | 579 |
| Tsunami | false |
| Place | 93 km NNE of Hihifo, Tonga |
| Types | ,dyfi,ground-failure,losspager,moment-tensor,origin,phase-data,shakemap, |
| Usgs Dyfi Mag | 6.1 |
| Usgs Dyfi Depth | 36 |
| Usgs Dyfi Felt | 13 |
| Usgs Dyfi Cdi | 4.8 |
| Usgs Dyfi CdiDescription | Light |
| Usgs Dyfi Mmi | 4.303 |
| Usgs Dyfi Alert | green |
| Usgs Dyfi Sig | 579 |
| Usgs Dyfi Tsunami | false |
| Usgs Dyfi Place | 93 km NNE of Hihifo, Tonga |
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 25/100, near Apia (Samoa), based on data from usgs_shakemap. Source: Calamity.live, a platform aggregating real-time data from 207 scientific monitoring sources.