Reviewed by USGSChile18y ago
M4.8 earthquake 141 km SE of Iquique, Chile
Monday, September 15, 2008, 03:23:24 UTC · 21.111°S, 69.181°W
A magnitude 4.8 earthquake struck 141 km SE of Iquique, Chile on Monday, September 15, 2008, 03:23:24 UTC, at a depth of 110.5 km (intermediate). It is the strongest earthquake within 300 km since an M5.3 on September 11, 2008.
- Magnitude
- 4.8
- Light · mb
- Depth
- 111 km
- Intermediate
- 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
239 tons of TNT
That is about 1/63 of the Hiroshima bomb. A magnitude 5.0 releases about 2 times more energy.
Tectonic setting
43 km
from the nearest mapped plate boundary, between the Altiplano and South American plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: intermediate
111 km
Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.
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 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M3.9 on September 30, 2008. 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 638 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.036 km NNE of Antofagasta, ChileJuly 30, 1995 · 273 km SW of this epicenter
- 7.8102 km ENE of Iquique, ChileJune 13, 2005 · 125 km N of this epicenter
- 7.751 km W of Atocha, BoliviaNovember 29, 1957 · 257 km E of this epicenter
- 7.736 km ESE of Tocopilla, ChileNovember 14, 2007 · 146 km SW of this epicenter
- 7.3136 km WSW of Challapata, BoliviaJune 6, 1915 · 241 km NE of this epicenter
- 7.334 km NE of Tocopilla, ChileDecember 21, 1967 · 117 km SW of this epicenter
- 7.334 km S of Iquique, ChileFebruary 23, 1933 · 124 km NW of this epicenter
- 7.2Near the coast of Tarapaca, ChileOctober 4, 1940 · 181 km NW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 41 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 2,412 recorded deaths. The most severe:
- 1877M8.3
Off North Coast
10 May 1877 · 143 km away · intensity XI
2,385 deaths$2 million damagetsunami
- 2005M7.7
Tarapaca
13 Jun 2005 · 125 km away
11 deaths$5 million damage
- 1987M6.9
Arica, Iquique
8 Aug 1987 · 247 km away · intensity VII
5 deaths$1 million damage
- 1953M7.4
Northern
7 Dec 1953 · 121 km away
3 deaths$7 million damage
- 1995M8.0
Antofagasta, Calama, Mejillones
30 Jul 1995 · 273 km away · intensity VII
3 deaths$2 million damagetsunami
- 2007M7.7
Tocopilla, Maria Elena
14 Nov 2007 · 146 km away · intensity VIII
2 deathsSevere damage ($5–24M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.