M3.3 earthquake 15km W of Delta, B.C., MX
A magnitude 3.3 earthquake struck 15km W of Delta, B.C., MX on Tue, Mar 21, 1939, 12:35 AM GMT-8 (08:35 UTC), 6 km (4 mi) below the surface.
A larger quake followed: M4.1 12km E of Holtville, CA. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ml), minor
- Local time
- UTC
- 1939-03-21 08:35:36 UTC
- Depth
- 6.0 km (3.7 mi), shallow
- Epicenter
- 32.355° N, 115.353° W
- Region
- Mexico
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 2.0 km horizontally, 31.6 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- Operator assigned
- Station coverage gap
- 334°, poorly surrounded by stations
- Stations used
- 2
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.112km E of Holtville, CA · 31963 days ago · 6 km deep · 50 km away
- 2.723km ENE of Campo, CA · 31962 days ago · 6 km deep · 91 km away
- 4.017km NNE of Holtville, CA · 31959 days ago · 6 km deep · 66 km away
- 3.75km S of Holtville, CA · 31959 days ago · 6 km deep · 46 km away
- 3.66km ENE of Holtville, CA · 31959 days ago · 6 km deep · 52 km away
- 3.22km S of Holtville, CA · 31938 days ago · 6 km deep · 48 km away
- 3.512km WSW of Progreso, B.C., MX · 31938 days ago · 6 km deep · 39 km away
- 3.24km ENE of Heber, CA · 31936 days ago · 6 km deep · 45 km away
Before
Earthquakes todayMexico earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ci3364928. Read Wed, Sep 23, 2026, 2:07 PM UTC.