Reviewed by USGSPanama14y ago
M4.5 earthquake 277 km SW of Arenas, Panama
Monday, June 4, 2012, 08:33:15 UTC · 5.461°N, 82.495°W
A magnitude 4.5 earthquake struck 277 km SW of Arenas, Panama on Monday, June 4, 2012, 08:33:15 UTC, at a depth of 10.0 km (shallow). It is the strongest earthquake within 300 km since an M4.6 on June 4, 2012.
- Magnitude
- 4.5
- Light · mb
- Depth
- 10 km
- Shallow
- 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
85 tons of TNT
That is about 1/178 of the Hiroshima bomb. A magnitude 5.0 releases about 6 times more energy.
Tectonic setting
43 km
from the nearest mapped plate boundary, between the Cocos and Nazca plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
10 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 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 275 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.544 km ESE of Burica, PanamaJuly 18, 1934 · 266 km N of this epicenter
- 7.245 km SW of Quebrada de Piedra, PanamaJanuary 20, 1904 · 267 km N of this epicenter
- 7.259 km SSE of Burica, PanamaJuly 26, 1962 · 230 km N of this epicenter
- 7.056 km SSE of Cambutal, PanamaMay 2, 1943 · 277 km NE of this epicenter
- 6.8south of PanamaJuly 18, 1934 · 222 km N of this epicenter
- 6.8146 km S of Punta de Burica, PanamaAugust 19, 1982 · 141 km N of this epicenter
- 6.8228 km WSW of Burica, PanamaMarch 3, 1906 · 287 km NW of this epicenter
- 6.878 km S of Boca Chica, PanamaSeptember 18, 1962 · 229 km N of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 6 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700. The most severe:
- 1962M7.4
Panama
26 Jul 1962 · 233 km away
Moderate damage ($1–5M)
- 2002M6.5
Baru, Alanje, David; Costa Rica: Laurel
31 Jul 2002 · 276 km away · intensity VII
Moderate damage ($1–5M)
- 1934M7.7
Panama-Costa Rica
18 Jul 1934 · 282 km away
Under $1 million damagetsunami
- 1962M6.8
Costa Rica-Panama
12 Mar 1962 · 285 km away
Limited damage (under $1M)tsunami
- 1913M6.7
Azuero Peninsula
2 Oct 1913 · 278 km away
Limited damage (under $1M)tsunami
- 1950
Panama
30 Apr 1950 · 128 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.