Reviewed by USGSPhilippines9y ago
M4.4 earthquake 41 km S of Daliao, Philippines
Monday, May 1, 2017, 23:07:41 UTC · 5.493°N, 124.894°E
A magnitude 4.4 earthquake struck 41 km S of Daliao, Philippines on Monday, May 1, 2017, 23:07:41 UTC, at a depth of 31.2 km (shallow).
- Magnitude
- 4.4
- Light · mb
- Depth
- 31 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 earthquakeDashed circle: 50 km aftershock search area
In context
How big was it, and why here?
Energy released
60 tons of TNT
That is about 1/251 of the Hiroshima bomb. A magnitude 5.0 releases about 8 times more energy.
Tectonic setting
282 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
31 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 50 km
USGS lists 3 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.4 on May 16, 2017. 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 1,499 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.31918 Mindanao, Philippines EarthquakeAugust 15, 1918 · 100 km W of this epicenter
- 8.11924 Mindanao, Philippines EarthquakeApril 14, 1924 · 189 km NE of this epicenter
- 8.01972 Mindanao, Philippines EarthquakeDecember 2, 1972 · 222 km NE of this epicenter
- 7.919 km WNW of Palimbang, PhilippinesAugust 16, 1976 · 129 km NW of this epicenter
- 7.947 km ESE of Kalbay, PhilippinesMarch 14, 1913 · 110 km E of this epicenter
- 7.8161 km SE of Sarangani, PhilippinesApril 1, 1936 · 214 km SE of this epicenter
- 7.7228 km SW of Sarangani, PhilippinesJune 11, 1972 · 206 km S of this epicenter
- 7.6101 km SE of Sarangani, PhilippinesDecember 16, 1910 · 155 km SE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 40 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 11,122 recorded deaths. The most severe:
- 1976M8.0
Mindanao: S
16 Aug 1976 · 126 km away · intensity VI
8,000 deaths$134 million damagetsunami
- 1856
Sangihe Pulau (Volcanic)
2 Mar 1856 · 214 km away
2,806 deathsSevere damage ($5–24M)tsunami
- 1913M7.8
Sangihe Island
14 Mar 1913 · 137 km away · intensity IX
138 deathsModerate damage ($1–5M)tsunami
- 1928M7.4
Cotabato,N Coast Of Illana Bay
19 Dec 1928 · 153 km away · intensity VII
97 deathsModerate damage ($1–5M)tsunami
- 1918M8.3
Mindanao: Cotabato
15 Aug 1918 · 100 km away · intensity X
52 deathsSevere damage ($5–24M)tsunami
- 2002M7.5
Mindanao
5 Mar 2002 · 93 km away
15 deaths$2 million damagetsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.