Philippines earthquakes

M4.6 earthquake 39 km NE of Hernani, Philippines

A magnitude 4.6 earthquake struck 39 km NE of Hernani, Philippines on Wed, Jun 20, 1984, 10:20 AM GMT+8 (02:20 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.1 23 km ENE of Sulat, Philippines. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
1984-06-20 02:20:16 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
11.577° N, 125.880° E
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.

Depth from
OPERATOR_ASSIGNED

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 5.123 km ENE of Sulat, Philippines · 15440 days ago · 46 km deep · 43 km away
  2. 4.7Samar, Philippines · 15436 days ago · 33 km deep · 54 km away
  3. 5.025 km E of Dapdap, Philippines · 15435 days ago · 33 km deep · 56 km away
  4. 4.517 km ENE of Sulat, Philippines · 15435 days ago · 60 km deep · 43 km away

Before

  1. 5.033 km ESE of Dolores, Philippines · 15440 days ago · 43 km deep · 40 km away
  2. 5.233 km ENE of Sulat, Philippines · 15440 days ago · 33 km deep · 37 km away
  3. 5.526 km E of Sulat, Philippines · 15440 days ago · 38 km deep · 34 km away
  4. 4.848 km E of Sulat, Philippines · 15441 days ago · 39 km deep · 28 km away
  5. 5.017 km ENE of Sulat, Philippines · 15445 days ago · 53 km deep · 45 km away
  6. 4.831 km E of Sulat, Philippines · 15448 days ago · 50 km deep · 32 km away
  7. 4.573 km ESE of Dapdap, Philippines · 15448 days ago · 33 km deep · 48 km away
  8. 5.356 km E of San Julian, Philippines · 15451 days ago · 46 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000254g. Read Mon, Sep 28, 2026, 2:06 AM UTC.