M4.6 earthquake 18 km NE of Hernani, Philippines
A magnitude 4.6 earthquake struck 18 km NE of Hernani, Philippines on Wed, Aug 2, 1978, 2:38 AM GMT+8 (18:38 UTC), 26 km (16 mi) below the surface.
A larger quake followed: M4.9 17 km WNW of General MacArthur, Philippines. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1978-08-01 18:38:43 UTC
- Depth
- 26.0 km (16.2 mi), shallow
- Epicenter
- 11.435° N, 125.745° E
- Region
- Philippines
- 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.
- Stations used
- 12
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.917 km WNW of General MacArthur, Philippines · 17565 days ago · 78 km deep · 41 km away
- 5.534 km ESE of Sulangan, Philippines · 17539 days ago · 68 km deep · 78 km away
- 5.328 km ESE of Sulangan, Philippines · 17539 days ago · 70 km deep · 78 km away
Before
Earthquakes todayPhilippines earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000vw6. Read Mon, Sep 21, 2026, 4:57 PM UTC.