Reviewed by USGSPhilippines115y ago
M6.2 earthquake 98 km E of Union, Philippines
Tuesday, April 29, 1913, 03:08:22 UTC · 9.734°N, 127.012°E
A magnitude 6.2 earthquake struck 98 km E of Union, Philippines on Tuesday, April 29, 1913, 03:08:22 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.3 on April 28, 1913.
- Magnitude
- 6.2
- Strong · mw
- Depth
- 15 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
31 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 65 times the energy of a magnitude 5.0.
Tectonic setting
29 km
from the nearest mapped plate boundary, between the Philippine Sea and Sunda plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
15 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
Did You Feel It?
Where it was felt
No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.
I felt it — report to USGS ↗USGS PAGER estimate
Who was exposed to shaking
USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.
After the main event
Aftershocks within 100 km
USGS has not published any M2.5+ earthquake within 100 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 12 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.774 km ENE of Barcelona, PhilippinesJuly 12, 1911 · 139 km S of this epicenter
- 7.270 km ENE of La Paz, PhilippinesApril 25, 1913 · 55 km S of this epicenter
- 7.110 km W of Bigaan, PhilippinesJuly 20, 1907 · 182 km SW of this epicenter
- 6.616 km E of Cagdianao, PhilippinesApril 24, 1913 · 133 km W of this epicenter
- 6.640 km ENE of Cortes, PhilippinesApril 18, 1913 · 62 km SW of this epicenter
- 6.642 km E of Aras-asan, PhilippinesOctober 10, 1906 · 107 km S of this epicenter
- 6.5166 km ENE of Barcelona, PhilippinesApril 26, 1913 · 147 km SE of this epicenter
- 6.421 km E of Union, PhilippinesApril 24, 1913 · 77 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 12 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1879
Nw Mindanao: Surigao
30 Jun 1879 · 166 km away · intensity X
Extreme damage ($25M+)
- 1911M7.8
Mindanao: Talacogon,Davao,Butuan
12 Jul 1911 · 138 km away · intensity X
Severe damage ($5–24M)tsunami
- 1871
Camiguin Island: Mambajao,Catarman
20 Feb 1871 · 263 km away · intensity IX
Severe damage ($5–24M)tsunami
- 1885
E Mindanao: Surigao
22 Feb 1885 · 166 km away · intensity VIII
Severe damage ($5–24M)
- 1897M8.1
Northern Samar
18 Oct 1897 · 275 km away · intensity IX
Moderate damage ($1–5M)tsunami
- 1909
Mindanao: E
18 Mar 1909 · 193 km away · intensity VIII
Moderate damage ($1–5M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.