Reviewed by USGSChile39y ago
M6.2 earthquake in Near the coast of Antofagasta, Chile
Wednesday, March 30, 1988, 23:50:56 UTC · 24.926°S, 70.461°W
A magnitude 6.2 earthquake struck in Near the coast of Antofagasta, Chile on Wednesday, March 30, 1988, 23:50:56 UTC, at a depth of 40.9 km (shallow). It is the strongest earthquake within 300 km since an M6.5 on February 5, 1988.
- Magnitude
- 6.2
- Strong · mw
- Depth
- 41 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- VI
- Strong (ShakeMap)
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquakeDashed circle: 100 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)
In context
How big was it, and why here?
Energy released
30 kilotons of TNT
That is about 2 times the Hiroshima bomb. It released about 63 times the energy of a magnitude 5.0.
Tectonic setting
106 km
from the nearest mapped plate boundary, between the Nazca and South American plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: shallow
41 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 100 km
USGS lists 1 M2.5+ earthquake within 100 km in the following 30 days; the largest was M4.5 on April 1, 1988. 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 269 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 · 279 km E of this epicenter
- 8.060 km W of Diego de Almagro, ChileDecember 4, 1918 · 172 km S of this epicenter
- 7.79 km SSW of Taltal, ChileDecember 28, 1966 · 63 km S of this epicenter
- 7.684 km SSE of Antofagasta, ChileMarch 5, 1987 · 67 km NE of this epicenter
- 7.583 km NNE of Taltal, ChileJuly 13, 1936 · 39 km NE of this epicenter
- 7.550 km WNW of Diego de Almagro, ChileJune 8, 1909 · 137 km S of this epicenter
- 7.4Atacama, ChileApril 18, 1939 · 258 km S of this epicenter
- 7.454 km WSW of Diego de Almagro, ChileOctober 4, 1983 · 179 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 30 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 23 recorded deaths. The most severe:
- 1859M7.6
Chile
5 Oct 1859 · 270 km away · intensity X
10 deathsUnder $1 million damagetsunami
- 1983M7.3
Northern: Copoapo-Chanaral
4 Oct 1983 · 179 km away · intensity VII
5 deaths$1 million damagetsunami
- 1966M7.8
Taltal, Catalina
28 Dec 1966 · 68 km away · intensity VIII
3 deathsUnder $1 million damagetsunami
- 1946M7.9
Northern
2 Aug 1946 · 175 km away
2 deathsSevere damage ($5–24M)tsunami
- 1936M7.3
Taltal
13 Jul 1936 · 66 km away
1 deathModerate damage ($1–5M)tsunami
- 1987M7.3
Antofagasta, Arica
5 Mar 1987 · 67 km away · intensity VI
1 deathModerate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.