Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Very strong mag. 6.6 earthquake - 83 km southwest of Tapachula de Cordova y Ordoñez, Chiapas, Mexico, on Wednesday, April 29, 1970 at 11:22 GMT

This quake was likely a foreshock of the 7.3 quake 60 km southwest of Tapachula de Cordova y Ordoñez, Chiapas, Mexico, April 29, 1970 14:01 GMT, which followed after 2 hours and 39 minutes.

Very strong mag. 6.6 earthquake - 83 km southwest of Tapachula de Cordova y Ordoñez, Chiapas, Mexico, on Wednesday, April 29, 1970 at 11:22 GMT

Very strong magnitude 6.6 earthquake at 35 km depth

Earthquake details

Date & time	Apr 29, 1970 11:22:37 UTC
Local time at epicenter
Status	Confirmed
Magnitude	6.6
Depth	35.0 km
Epicenter latitude / longitude	14.425°N / 92.847°W (North Pacific Ocean, Mexico)
Antipode	14.425°S / 87.153°E
Shaking intensity	Strong shaking near epicenter
Felt	0 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	Tacana (111 km / 69 mi)
Nearby towns and cities	56 km (35 mi) SW of Puerto Madero (Tapachula) (pop: 9,560) \| Show on map \| Quakes nearby 65 km (40 mi) SW of Mazatlan (Mazatán) (pop: 6,840) \| Show on map \| Quakes nearby 68 km (42 mi) W of Brisas Barra de Suchiate (pop: 13,700) \| Show on map \| Quakes nearby 80 km (50 mi) WSW of Ciudad Hidalgo (pop: 14,600) \| Show on map \| Quakes nearby 83 km (51 mi) SW of Tapachula de Cordova y Ordoñez (pop: 202,700) \| Show on map \| Quakes nearby 83 km (52 mi) SW of Huehuetan (Huehuetán) (pop: 7,760) \| Show on map \| Quakes nearby 89 km (56 mi) SSW of Huixtla (pop: 32,000) \| Show on map \| Quakes nearby 92 km (57 mi) SSW of Pueblo Nuevo (San Juan) (pop: 7,200) \| Show on map \| Quakes nearby 97 km (60 mi) SW of Cacahoatan (Cacahoatán) (pop: 16,600) \| Show on map \| Quakes nearby 869 km (540 mi) SE of Mexico (pop: 12,294,200) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake
Estimated seismic energy released	5 x 10¹⁴ joules (139 gigawatt hours, equivalent to 1.2 x 10⁵ tons of TNT or 7.5 atomic bombs!) \| about seismic energy

Show interactive Map

[smaller] [bigger]

Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.

Mag.	Depth	Location	Source
6.6	35 km	offshore Chiapas, Mexico	USGS

Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

Most recent quakes Top 20 past 24 hrs Quakes in Mexico

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Aftershocks

[More info]

Recorded aftershocks, latest first (8 quakes)

Date and time	Mag Depth	Location	Details
May 15, 1970 09:44 53 years ago	5.8 35 km	97 km SW of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More
May 2, 1970 02:06 53 years ago	5.9 35 km	150 km SW of Huixtla, Chiapas, Mexico	More
May 1, 1970 08:35 53 years ago	5.8 35 km	123 km SW of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More
Apr 30, 1970 13:21 53 years ago	5.8 35 km	126 km W of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More
Apr 30, 1970 12:51 53 years ago	6.0 35 km	136 km SW of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More
Apr 30, 1970 08:33 53 years ago	6.6 35 km	114 km W of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More
Apr 29, 1970 21:20 53 years ago	5.8 35 km	93 km SW of Mapastepec, Chiapas, Mexico	More
Apr 29, 1970 14:01 53 years ago	7.3 35 km	60 km SW of Tapachula de Cordova y Ordoñez, Chiapas, Mexico	More

Earlier earthquakes in the same area

Click here to search our database for earlier earthquakes in the same area since 1900!

Try our free app!

Android | iOS version

Why is there advertising on this site?

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:

Improved multilanguage support
Tsunami alerts
Faster responsiveness

Thanks to your past donations, these features have been added recently:

Design upgrade
Detailed quake stats
Additional seismic data sources

Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS

Thank you!

Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.

Volcanoes & Earthquakes