Reviewed by USGSPhilippines115y ago
M6.3 earthquake 25 km WSW of Jabonga, Philippines
Monday, April 28, 1913, 18:39:26 UTC · 9.275°N, 125.291°E
A magnitude 6.3 earthquake struck 25 km WSW of Jabonga, Philippines on Monday, April 28, 1913, 18:39:26 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.5 on April 26, 1913.
- Magnitude
- 6.3
- 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
47 kilotons of TNT
That is about 3 times the Hiroshima bomb. It released about 99 times the energy of a magnitude 5.0.
Tectonic setting
167 km
from the nearest mapped plate boundary, between the Philippine Sea and Sunda plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
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 14 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 · 210 km SE of this epicenter
- 7.270 km ENE of La Paz, PhilippinesApril 25, 1913 · 170 km E of this epicenter
- 7.15 km N of Capoocan, PhilippinesMarch 5, 1908 · 241 km N of this epicenter
- 7.110 km W of Bigaan, PhilippinesJuly 20, 1907 · 145 km SE of this epicenter
- 6.616 km E of Cagdianao, PhilippinesApril 24, 1913 · 90 km NE of this epicenter
- 6.640 km ENE of Cortes, PhilippinesApril 18, 1913 · 136 km E of this epicenter
- 6.642 km E of Aras-asan, PhilippinesOctober 10, 1906 · 162 km E of this epicenter
- 6.55 km SSW of Mantalongon, PhilippinesOctober 11, 1906 · 210 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 19 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 · 253 km away
4 deathsModerate damage ($1–5M)
- 1879
Nw Mindanao: Surigao
30 Jun 1879 · 63 km away · intensity X
Extreme damage ($25M+)
- 1911M7.8
Mindanao: Talacogon,Davao,Butuan
12 Jul 1911 · 84 km away · intensity X
Severe damage ($5–24M)tsunami
- 1902M7.3
Mindanao: Lanao, Cotabato
21 Aug 1902 · 279 km away · intensity X
Severe damage ($5–24M)tsunami
- 1743
Leyte
Sep 1743 · 240 km away
Severe damage ($5–24M)
- 1871
Camiguin Island: Mambajao,Catarman
20 Feb 1871 · 68 km away · intensity IX
Severe damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.