Reviewed by USGSBolivia117y ago
M7.2 earthquake 78 km SW of Colchani, Bolivia
Tuesday, October 4, 1910, 23:00:19 UTC · 20.735°S, 67.532°W
A magnitude 7.2 earthquake struck 78 km SW of Colchani, Bolivia on Tuesday, October 4, 1910, 23:00:19 UTC, at a depth of 120.0 km (intermediate). No earthquake of this size or larger appears within 300 km in the USGS catalog since 1900.
- Magnitude
- 7.2
- Major · mB
- Depth
- 120 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 earthquake
In context
How big was it, and why here?
Energy released
951 kilotons of TNT
That is about 63 times the Hiroshima bomb. It released about 1,995 times the energy of a magnitude 5.0.
Tectonic setting
85 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
120 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 200 km
USGS has not published any M2.5+ earthquake within 200 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 1 M5.0+ earthquake within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 10 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1871M7.3
Chile
5 Oct 1871 · 284 km away · intensity X
Severe damage ($5–24M)tsunami
- 1869M6.8
Iquique
21 Aug 1869 · 258 km away
tsunami
- 1870
Chile
22 Apr 1870 · 242 km away · intensity X
- 1877
Northern: Huanillos
15 May 1877 · 272 km away
tsunami
- 1877
Iquique
23 Aug 1877 · 274 km away
tsunami
- 1878
Northern
12 Mar 1878 · 274 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.