3.1
Earthquake Details: San Juan, Argentina
8/20/2026, 2:21:51 AM
A magnitude 3.1 earthquake occurred near San Juan, Argentina on 8/20/2026 at 2:21:51 AM. The seismic event was recorded at a depth of -91 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Regional Seismicity
Technical Details
Depth-91 km
Significance0
Latitude-31.9400
Longitude-70.1600
Event IDemsc:20260820_0000079
Magnitude3.1
Updated:8/20/2026, 2:29:14 AM
External Resources
View on EMSC Official SiteLoading map...
Time & depth
- Local time
- 8/19/2026, 10:21:51 PM GMT-4
- UTC
- 8/20/2026, 2:21:51 AM UTC
-91 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby major cities
Nearby event sequence · 12
M3.0Maule, ChileBeforeM3.0Offshore Valparaiso, ChileBeforeM3.4Region Metropolitana, ChileBeforeM3.3Coquimbo, ChileBeforeM3.5Valparaiso, ChileBeforeM3.8Region Metropolitana, ChileBeforeM3.6Mendoza, ArgentinaBeforeM3.0San Juan, ArgentinaBeforeM4.2Coquimbo, ChileBeforeM3.1San Juan, ArgentinaBeforeM3.0Atacama, ChileBeforeM3.2Maule, ChileAfter
Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 20, 2026, 02:29 AM UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.