Philippines earthquakes

M5.5 earthquake 79 km NE of Alugan, Philippines

A magnitude 5.5 earthquake struck 79 km NE of Alugan, Philippines on Fri, Oct 31, 1975, 6:25 PM GMT+8 (10:25 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M6.1 73 km ENE of San Policarpo, Philippines. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
5.5 (mb), moderate
Local time
UTC
1975-10-31 10:25:22 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
12.728° N, 125.995° 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.

Stations used
49

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 48 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 5.299 km ENE of San Policarpo, Philippines · 18596 days ago · 33 km deep · 30 km away
  2. 4.766 km ENE of San Policarpo, Philippines · 18596 days ago · 33 km deep · 30 km away
  3. 5.071 km ENE of San Policarpo, Philippines · 18596 days ago · 76 km deep · 27 km away
  4. 4.895 km ENE of San Policarpo, Philippines · 18596 days ago · 23 km deep · 45 km away
  5. 4.279 km ENE of San Policarpo, Philippines · 18596 days ago · 137 km deep · 28 km away
  6. 4.964 km E of San Policarpo, Philippines · 18596 days ago · 33 km deep · 61 km away
  7. 4.999 km E of San Policarpo, Philippines · 18596 days ago · 84 km deep · 82 km away
  8. 4.751 km NE of Alugan, Philippines · 18596 days ago · 111 km deep · 29 km away
  9. 5.071 km ENE of San Policarpo, Philippines · 18596 days ago · 33 km deep · 47 km away
  10. 5.173 km ENE of San Policarpo, Philippines · 18596 days ago · 33 km deep · 49 km away
  11. 5.155 km NE of San Policarpo, Philippines · 18596 days ago · 40 km deep · 30 km away
  12. 4.7Philippine Islands region · 18596 days ago · 135 km deep · 6 km away
  13. 4.9121 km E of San Policarpo, Philippines · 18595 days ago · 33 km deep · 98 km away
  14. 5.054 km NE of Alugan, Philippines · 18595 days ago · 14 km deep · 26 km away
  15. 4.7Samar, Philippines · 18595 days ago · 33 km deep · 55 km away
  16. 5.239 km ESE of San Policarpo, Philippines · 18595 days ago · 33 km deep · 73 km away
  17. 5.526 km ESE of Dolores, Philippines · 18595 days ago · 41 km deep · 87 km away
  18. 5.1103 km E of San Policarpo, Philippines · 18595 days ago · 33 km deep · 86 km away
  19. 5.162 km NE of Alugan, Philippines · 18595 days ago · 51 km deep · 18 km away
  20. 5.159 km NE of Alugan, Philippines · 18595 days ago · 48 km deep · 21 km away
  21. 4.742 km NE of Alugan, Philippines · 18595 days ago · 33 km deep · 38 km away
  22. 4.887 km NE of Alugan, Philippines · 18595 days ago · 33 km deep · 15 km away
  23. 4.992 km NE of Alugan, Philippines · 18594 days ago · 33 km deep · 21 km away
  24. 5.172 km ENE of San Policarpo, Philippines · 18593 days ago · 33 km deep · 25 km away
  25. 5.182 km NE of Alugan, Philippines · 18592 days ago · 33 km deep · 11 km away
  26. 5.099 km NE of Cabatuan, Philippines · 18592 days ago · 41 km deep · 52 km away
  27. 6.173 km ENE of San Policarpo, Philippines · 18590 days ago · 11 km deep · 22 km away
  28. 4.573 km ENE of San Policarpo, Philippines · 18587 days ago · 33 km deep · 36 km away
  29. 6.187 km NE of Anito, Philippines · 18581 days ago · 11 km deep · 26 km away
  30. 5.591 km NE of Cabatuan, Philippines · 18579 days ago · 26 km deep · 39 km away
  31. 4.6114 km NE of Cabodiongan, Philippines · 18579 days ago · 89 km deep · 97 km away
  32. 4.8103 km NE of Cabatuan, Philippines · 18579 days ago · 33 km deep · 67 km away
  33. 4.889 km NE of Alugan, Philippines · 18577 days ago · 33 km deep · 12 km away
  34. 5.164 km NE of Anito, Philippines · 18577 days ago · 33 km deep · 34 km away
  35. 5.174 km NE of Anito, Philippines · 18577 days ago · 33 km deep · 27 km away
  36. 5.380 km NE of Cabatuan, Philippines · 18576 days ago · 33 km deep · 44 km away
  37. 5.1123 km NE of Cabodiongan, Philippines · 18575 days ago · 25 km deep · 84 km away
  38. 5.493 km NE of Anito, Philippines · 18572 days ago · 33 km deep · 29 km away
  39. 5.185 km NE of Anito, Philippines · 18569 days ago · 33 km deep · 33 km away
  40. 4.974 km NE of Anito, Philippines · 18569 days ago · 33 km deep · 32 km away
  41. 5.345 km ESE of Dolores, Philippines · 18567 days ago · 64 km deep · 95 km away
  42. 5.176 km ENE of San Policarpo, Philippines · 18567 days ago · 56 km deep · 49 km away
  43. 5.230 km ESE of Dolores, Philippines · 18566 days ago · 33 km deep · 92 km away
  44. 5.671 km ENE of Alugan, Philippines · 18565 days ago · 30 km deep · 17 km away
  45. 5.333 km ESE of Dolores, Philippines · 18554 days ago · 53 km deep · 88 km away
  46. 4.935 km ESE of Dolores, Philippines · 18554 days ago · 33 km deep · 94 km away
  47. 5.282 km NE of Cabatuan, Philippines · 18552 days ago · 33 km deep · 40 km away
  48. 4.826 km E of Dapdap, Philippines · 18536 days ago · 109 km deep · 79 km away

Before

  1. 5.0103 km ENE of San Policarpo, Philippines · 18596 days ago · 33 km deep · 56 km away
  2. 7.266 km ENE of Alugan, Philippines · 18596 days ago · 50 km deep · 21 km away
  3. 5.778 km ENE of San Policarpo, Philippines · 18597 days ago · 53 km deep · 26 km away
  4. 4.348 km NE of San Policarpo, Philippines · 18599 days ago · 384 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000dc5. Read Tue, Sep 29, 2026, 11:32 AM UTC.