A major earthquake shakes Mexico City

last night califona had a small quake i wonder if it was a fore shock of something bigger and could quakes be related

a reply to: proteus33

I was wondering the same thing, also thought it was odd they had that on the news up here.

Constant updates here/live feed

News in Spanish say 122 dead for now

This will only get worse, whatever it is that is causing the molten iron jet in Earth's interior to spin more quickly is causing more and more pressure to build faster. Unfortunately this is only the beginning, and since the molten iron jet covers the whole northern hemisphere, Mexico won't be the only place affected. My prayers go to the people of Mexico that were affected.

Can anyone recommend a good site or app to monitor for live seismic events ?

Have there been any aftershocks?

Was just coming on here to ask the same thing. I am hearing there have not been any after shocks. Which if that is the case it scares the # out of me because that means this one could possibly be a foreshock.

a reply to: loam

Not yet, but we might have just had one.

Waiting on the agencies.



Here's the signature


Still waiting on agencies.


NOT and aftershock of the 7.1. Based on location, this is more likely an aftershock of the 8.1:

Magnitude M 4.7
Region OFFSHORE OAXACA, MEXICO
Date time 2017-09-20 04:15:45.0 UTC
Location 15.55 N ; 95.08 W
Depth 16 km
Distances 501 km W of Guatemala City, Guatemala / pop: 995,000 / local time: 22:15:45.0 2017-09-19
241 km SE of Oaxaca de Juárez, Mexico / pop: 263,000 / local time: 23:15:45.0 2017-09-19
69 km S of Salina Cruz, Mexico / pop: 73,700 / local time: 23:15:45.0 2017-09-19

EMSC

This guy from you tube forecast this quake.. I have been watching him over the last two months and it is interesting on how he comes up with his quake watches.. He gives 7 day warnings for most of the big quakes... He nailed this one. youtu.be...

a reply to: jadedANDcynical

Is that unusual?

So, am I correct in saying all the smaller quakes I've seen listed are aftershocks of the 8.1?

Does this mean yesterday's quake could be a foreshock, and if so - how large and where?

I heard someone speculate that this could lead to the so-called "big one" for Los Angeles.

a reply to: loam

In general a 7.1 will produce fairly significant aftershocks; up to and including M6. In this case, so far, they have all been below M4, which is why USGS and EMSC don't have anylisted for the area.

The Mexican Seismological Agency has several listed below M4:



Will be watching and will update if any of significance occur.

a reply to: loam

Doesn't it seem weird? Where are the aftershocks? Hope that the 7.1 wasn't a foreshock to a larger quake...

originally posted by: Watcher777
I seriously thought we would have one here today in the US. I have checked the USGS at least five times since last night. Still feels like a bigger one is coming, maybe it is just this time of year.

Fall always feels like earthquake weather.

Interesting perception. We're also having the Autumn equinox when the relative positive of the Sun to the Earth crosses the equator.

So I just spent a little time going over quakes at the Mexican Seismological Agency and found several aftershocks for the 7.1. So far, they are all below M4, but they have been happening. When you go to the link above, you are looking for quakes in the 17-19 degree latitude range, for example, this one:

3.7 2017-09-21 07:25:31 1 km al OESTE de XOCHITEPEC, MOR: 18.78°, -99.24° 5 km

There is still the potential for damaging aftershocks from the 7.1, though that decreases a bit each day in accordance to Omori's Law. I hope the trnd of smaller aftershocks continue for this particular quake so rescue and recovery efforts can continue unimpeded.


The 8.1 is still regularly producing M4+ aftershocks and an occasional M5+ and the likelihood of strong aftershock on that fault also decreases each day.