Reviewed by USGSPhilippines108y ago
M6.6 earthquake 46 km NNE of Coron, Philippines
Sunday, April 27, 1919, 00:21:59 UTC · 12.351°N, 120.429°E
A magnitude 6.6 earthquake struck 46 km NNE of Coron, Philippines on Sunday, April 27, 1919, 00:21:59 UTC, at a depth of 15.0 km (shallow). It is the strongest earthquake within 300 km since an M6.7 on March 21, 1919.
- Magnitude
- 6.6
- Strong · mw
- Depth
- 15 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VI
- Strong (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
108 kilotons of TNT
That is about 7 times the Hiroshima bomb. It released about 226 times the energy of a magnitude 5.0.
Tectonic setting
231 km
from the nearest mapped plate boundary, between the Caribbean and South American 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 5 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 6.829 km NNW of Roxas City, PhilippinesMarch 12, 1915 · 253 km E of this epicenter
- 6.745 km SW of Saysain, PhilippinesMarch 21, 1919 · 223 km N of this epicenter
- 6.6Luzon, PhilippinesNovember 24, 1907 · 255 km NE of this epicenter
- 6.024 km WSW of Mabiton, PhilippinesMay 28, 1917 · 288 km E of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 33 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 1,755 recorded deaths. The most severe:
- 1911
Luzon: Taal Volcano
27 Jan 1911 · 193 km away · intensity IX
1,335 deathsSevere damage ($5–24M)tsunami
- 1863M6.5
Manila, Rizal, Bulacan
3 Jun 1863 · 247 km away · intensity X
400 deathsExtreme damage ($25M+)tsunami
- 1754
Taal Volcano
15 May 1754 · 193 km away · intensity X
12 deathsExtreme damage ($25M+)
- 1743
Luzon: Tayabas,Laguna
12 Jan 1743 · 223 km away · intensity X
5 deathsModerate damage ($1–5M)
- 1852M7.5
Luzon: Bataan, Rizal, Pampanga,Manila
16 Sep 1852 · 184 km away · intensity IX
3 deathsSevere damage ($5–24M)tsunami
- 1716
Taal, Manila, Rizal, Laguna, Cavite
24 Sep 1716 · 193 km away · intensity VII
Severe damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.