Reviewed by USGSArgentina33y ago
M4.1 earthquake 57 km WNW of Abra Pampa, Argentina
Friday, June 18, 1993, 07:46:05 UTC · 22.502°S, 66.202°W
A magnitude 4.1 earthquake struck 57 km WNW of Abra Pampa, Argentina on Friday, June 18, 1993, 07:46:05 UTC, at a depth of 253.8 km (intermediate).
- Magnitude
- 4.1
- Light · mb
- Depth
- 254 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
21 tons of TNT
That is about 1/707 of the Hiroshima bomb. A magnitude 5.0 releases about 22 times more energy.
Tectonic setting
111 km
from the nearest mapped plate boundary, between the Altiplano and South American plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: intermediate
254 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 has not published any M2.5+ earthquake within 50 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 300 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.2121 km SSE of San Pedro de Atacama, ChileDecember 9, 1950 · 240 km SW of this epicenter
- 7.751 km W of Atocha, BoliviaNovember 29, 1957 · 181 km N of this epicenter
- 7.278 km SW of Colchani, BoliviaOctober 4, 1910 · 240 km NW of this epicenter
- 7.069 km NW of Camargo, BoliviaMay 17, 1909 · 251 km N of this epicenter
- 7.087 km W of Abra Pampa, ArgentinaMay 24, 1993 · 40 km SW of this epicenter
- 7.052 km W of Abra Pampa, ArgentinaApril 1, 1987 · 29 km S of this epicenter
- 6.930 km SSE of Santa Clara, ArgentinaAugust 25, 1948 · 285 km SE of this epicenter
- 6.999 km WNW of San Antonio de los Cobres, ArgentinaFebruary 21, 1971 · 174 km SW of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 17 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 35 recorded deaths. The most severe:
- 1930M6.1
La Poma
24 Dec 1930 · 300 km away · intensity VIII
31 deathsSevere damage ($5–24M)
- 1953M7.4
Northern
7 Dec 1953 · 261 km away
3 deaths$7 million damage
- 1950M8.0
Chile-Argentina
9 Dec 1950 · 173 km away · intensity VII
1 death
- 1844M6.5
Salta, Jujuy, Tucuman
19 Oct 1844 · 279 km away · intensity VII
Severe damage ($5–24M)
- 1899M6.9
Southern; Argentina: Salta
23 Mar 1899 · 267 km away · intensity X
Moderate damage ($1–5M)
- 1948M6.9
Salta
25 Aug 1948 · 285 km away · intensity IX
Moderate damage ($1–5M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.