Reviewed by USGSBrazil113y ago
M6.7 earthquake 21 km WSW of Tarauacá, Brazil
Friday, April 23, 1915, 15:29:17 UTC · 8.258°S, 70.933°W
A magnitude 6.7 earthquake struck 21 km WSW of Tarauacá, Brazil on Friday, April 23, 1915, 15:29:17 UTC, at a depth of 620.0 km (deep). It is the strongest earthquake within 300 km since an M7.4 on April 28, 1911.
- Magnitude
- 6.7
- Strong · mw
- Depth
- 620 km
- Deep
- 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
158 kilotons of TNT
That is about 10 times the Hiroshima bomb. It released about 331 times the energy of a magnitude 5.0.
Tectonic setting
221 km
from the nearest mapped plate boundary, between the Sunda and Australian plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: deep
620 km
Deep earthquakes (over 300 km) happen deep inside subducting plates. They rarely cause damage, but can be felt faintly over very large distances.
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 1 M5.0+ earthquake within 300 km before this one (catalog from 1900; older records are less complete). The strongest: