Reviewed by USGSMexico13y ago
M4.7 earthquake 10 km SW of Francisco I. Madero, Mexico
Friday, February 8, 2013, 21:06:11 UTC · 15.011°N, 92.623°W
A magnitude 4.7 earthquake struck 10 km SW of Francisco I. Madero, Mexico on Friday, February 8, 2013, 21:06:11 UTC, at a depth of 98.4 km (intermediate). USGS received 4 “Did You Feel It?” reports, with a maximum reported intensity of IV (light). It is the strongest earthquake within 300 km since an M4.9 on January 11, 2013.
- Magnitude
- 4.7
- Light · mb
- Depth
- 98 km
- Intermediate
- Felt reports
- 4
- Max intensity IV
- 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
169 tons of TNT
That is about 1/89 of the Hiroshima bomb. A magnitude 5.0 releases about 3 times more energy.
Tectonic setting
147 km
from the nearest mapped plate boundary, between the Cocos and North American plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.
Depth: intermediate
98 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
Reports sent by people to USGS, grouped by place (most reports first). Intensity uses the Modified Mercalli scale (I–X): what people felt, not the magnitude.
| Place | Intensity | Reports | Distance |
|---|---|---|---|
| Tapachula, Chiapas, Mexico | IV · Light | 2 | 106 km |
| Quetzaltenango, Quezaltenango, Guatemala | II · Weak | 1 | 154 km |
| Jiquipilas, Chiapas, Mexico | II · Weak | 1 | 234 km |
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 648 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.726 km SSW of La Gomera, GuatemalaAugust 6, 1942 · 203 km SE of this epicenter
- 7.433 km S of Champerico, GuatemalaNovember 7, 2012 · 138 km SE of this epicenter
- 7.34 km SSW of Puerto Madero, MexicoDecember 14, 1935 · 41 km SE of this epicenter
- 7.334 km SW of Puerto Madero, MexicoApril 29, 1970 · 60 km S of this epicenter
- 7.2127 km SW of La Esperanza (El Zapotal), MexicoMarch 30, 1914 · 152 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 40 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 7,684 recorded deaths. The most severe:
- 1917M6.0
Guatemala City
26 Dec 1917 · 222 km away · intensity IX
2,650 deathsExtreme damage ($25M+)
- 1902M7.5
Quezaltenango, San Marcos
19 Apr 1902 · 208 km away
2,000 deathsSevere damage ($5–24M)tsunami
- 1982M3.5
Chiapas
28 Mar 1982 · 257 km away
1,879 deaths$3 million damage
- 1773
St. Jago
3 Jun 1773 · 212 km away
600 deathsExtreme damage ($25M+)tsunami
- 1874M7.1
Antigua,Chimaltenango,Amatitlan
3 Sep 1874 · 214 km away · intensity VIII
300 deathsSevere damage ($5–24M)
- 1773M7.5
Antigua
29 Jul 1773 · 212 km away · intensity VIII
100 deathsModerate damage ($1–5M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.