Reviewed by USGSMexico31y ago
M4.4 earthquake 14 km SW of Cristóbal Obregón, Mexico
Saturday, November 18, 1995, 14:30:57 UTC · 16.271°N, 93.643°W
A magnitude 4.4 earthquake struck 14 km SW of Cristóbal Obregón, Mexico on Saturday, November 18, 1995, 14:30:57 UTC, at a depth of 33.0 km (shallow).
- Magnitude
- 4.4
- Light · mb
- Depth
- 33 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
60 tons of TNT
That is about 1/251 of the Hiroshima bomb. A magnitude 5.0 releases about 8 times more energy.
Tectonic setting
217 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: shallow
33 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 289 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 7.48 km ENE of Santiago Xanica, MexicoMarch 22, 1928 · 270 km W of this epicenter
- 7.44 km NW of Santa María Zapotitlán, MexicoAugust 23, 1965 · 239 km W of this epicenter
- 7.34 km SSW of Puerto Madero, MexicoDecember 14, 1935 · 218 km SE of this epicenter
- 7.334 km SW of Puerto Madero, MexicoApril 29, 1970 · 229 km SE of this epicenter
- 7.2127 km SW of La Esperanza (El Zapotal), MexicoMarch 30, 1914 · 188 km S of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 35 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 1,991 recorded deaths. The most severe:
- 1982M3.5
Chiapas
28 Mar 1982 · 118 km away
1,879 deaths$3 million damage
- 1959M6.9
Gulf Of Campeche
26 Aug 1959 · 240 km away
25 deathsSevere damage ($5–24M)
- 1870M7.9
Oaxaca,Zanaguia,San Francisco Ozolotepec
11 May 1870 · 300 km away
24 deathsSevere damage ($5–24M)tsunami
- 1816M7.5
Soloma
22 Jul 1816 · 245 km away · intensity IX
23 deathsSevere damage ($5–24M)
- 1968M6.1
S Chiapas
25 Sep 1968 · 142 km away
20 deathsModerate damage ($1–5M)tsunami
- 1801M7.0
Oaxaca
5 Oct 1801 · 262 km away
7 deathsSevere damage ($5–24M)
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.