Reviewed by USGSPhilippines98y ago
M6.4 earthquake 64 km E of Aras-asan, Philippines
Sunday, June 30, 1929, 02:44:52 UTC · 8.813°N, 126.896°E
A magnitude 6.4 earthquake struck 64 km E of Aras-asan, Philippines on Sunday, June 30, 1929, 02:44:52 UTC, at a depth of 30.0 km (shallow). It is the strongest earthquake within 300 km since an M7.2 on June 13, 1929.
- Magnitude
- 6.4
- Strong · mw
- Depth
- 30 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- V
- Moderate (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 100 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
69 kilotons of TNT
That is about 5 times the Hiroshima bomb. It released about 145 times the energy of a magnitude 5.0.
Tectonic setting
14 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
30 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 lists 2 M2.5+ earthquakes within 100 km in the following 30 days; the largest was M5.6 on July 2, 1929. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 56 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.11924 Mindanao, Philippines EarthquakeApril 14, 1924 · 256 km S of this epicenter
- 7.774 km ENE of Barcelona, PhilippinesJuly 12, 1911 · 39 km S of this epicenter
- 7.462 km E of Baculin, PhilippinesNovember 11, 1921 · 154 km S of this epicenter
- 7.222 km ESE of Bobon, PhilippinesJanuary 1, 1919 · 227 km S of this epicenter
- 7.25 km ESE of Veruela, PhilippinesJune 13, 1929 · 130 km SW of this epicenter
- 7.270 km ENE of La Paz, PhilippinesApril 25, 1913 · 51 km N of this epicenter
- 7.270 km E of Aras-asan, PhilippinesAugust 30, 1924 · 19 km N of this epicenter
- 7.25 km NW of Kadingilan, PhilippinesMarch 2, 1923 · 258 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 21 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 4 recorded deaths. The most severe:
- 1870
Mindanao: Davao,Blanco
4 Nov 1870 · 260 km away
4 deathsModerate damage ($1–5M)
- 1879
Nw Mindanao: Surigao
30 Jun 1879 · 188 km away · intensity X
Extreme damage ($25M+)
- 1924M8.3
E Mindanao: Mati,Suriga
14 Apr 1924 · 261 km away · intensity IX
Severe damage ($5–24M)tsunami
- 1911M7.8
Mindanao: Talacogon,Davao,Butuan
12 Jul 1911 · 101 km away · intensity X
Severe damage ($5–24M)tsunami
- 1871
Camiguin Island: Mambajao,Catarman
20 Feb 1871 · 248 km away · intensity IX
Severe damage ($5–24M)tsunami
- 1885
E Mindanao: Surigao
22 Feb 1885 · 188 km away · intensity VIII
Severe damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.