Quake Watch 2012

reply to post by TrueAmerican


Dear TA,

As stated by Mr Muzzy there are no returns. I have to disallow any credit against a future quake however on the grounds that the earthquake in question was very close to the seismo station.



It is quite normal for this size of event to produce a trace such as this at the given distance and depth.

If you have any further questions please contact the Ombudsman and not USGS as they will only give you a further discount.

Regards
Puterman

reply to post by Anneke


Ah, the magnitudes scales. Always a problem to get one's head around the differences. The main thing is that the GeoNet Magnitude of 5.582 is Richter Scale (So quaint) and the USGS one and the EMSC ones of 4.7 are mb or body magnitude.

Sometimes ones gets lucky and the USGS phase data happens to have the ML (Richter) and the mb values unfortunately in this case it does not. It would be useful to have a moment tensor for this but I doubt one will be calculated at this size of earthquake.

I suspect that the USGS value is actually lower than the GeoNet value as they usually are, but unfortunately you can't tell because the scales are different. There are conversions between the two scales but they are not easy as the ML (Richter) scale will have been formulated specifically for New Zealand, and possibly specifically for that area.

ML scale calculations are different around the world so unless you know the basis for an area it is not easy to swap scales. Theoretically the results of ML scales around the world should be the same, but I have my doubts on that.

Magnitude mb 6.0
Region PAPUA, INDONESIA
Date time 2012-03-20 17:56:21.0 UTC
Location 4.05 S ; 140.31 E
Depth 80 km
Distances 2048 km SE Davao (pop 1,212,504 ; local time 01:56:21.4 2012-03-21)
161 km S Aberpura (pop 62,248 ; local time 02:56:21.4 2012-03-21)
174 km S Jaya pura (pop 134,895 ; local time 02:56:21.4 2012-03-21)

EMSC

www.businessinsider.com...

anyone hear or see anything about this 7.6 quake in near mexico city?

Bloomberg is saying it's a 7.6 quake "21 miles south of Guerrro, Mexico

Magnitude mb 6.4 Region GUERRERO, MEXICO

Date time 2012-03-20 18:02:53.8 UTC

Location 16.72 N ; 98.21 W

Depth 60 km

Distances 259 km S Puebla (pop 1,392,099 ; local time 12:02:53.8 2012-03-20) 163 km W Oaxaca (pop 262,566 ; local time 12:02:53.8 2012-03-20) 23 km E Ometepec (pop 17,801 ; local time 12:02:53.8 2012-03-20) 8 km SE Xochistlahuaca (pop 3,566 ; local time 12:02:53.8 2012-03-20)

source(www.emsc-csem.org...

To be revised,I guess.

Magnitude 6.0 - Papua, Indonesia

Date time 2012-03-20 17:56:21.0 UTC
Location 4.05 S ; 140.31 E
Depth 80 km
Distances 2048 km SE Davao (pop 1,212,504 ; local time 01:56:21.4 2012-03-21)
161 km S Aberpura (pop 62,248 ; local time 02:56:21.4 2012-03-21)
174 km S Jaya pura (pop 134,895 ; local time 02:56:21.4 2012-03-21) EMSC

Magnitude 6.4 - Guerrero, Mexico

Date time 2012-03-20 18:02:53.8 UTC
Location 16.72 N ; 98.21 W
Depth 60 km
Distances 259 km S Puebla (pop 1,392,099 ; local time 12:02:53.8 2012-03-20)
163 km W Oaxaca (pop 262,566 ; local time 12:02:53.8 2012-03-20)
23 km E Ometepec (pop 17,801 ; local time 12:02:53.8 2012-03-20)
8 km SE Xochistlahuaca (pop 3,566 ; local time 12:02:53.8 2012-03-20) EMSC

reply to post by diamondsmith


wow I had an odd feeling about this quake and I found it on a news site when looking for it... odd dont ask me why... Current moon view of earth.

Oops, I was typing mine while you guys posted.

Magnitude 7.9 - Guerrero, Mexico

Magnitude
7.9 (Preliminary magnitude — update expected within 15 minutes)
Date-Time
Tuesday, March 20, 2012 at 18:02:53 UTC
Tuesday, March 20, 2012 at 12:02:53 PM at epicenter
Location
17.041°N, 98.115°W
Depth
10 km (6.2 miles) set by location program
Region
GUERRERO, MEXICO
Distances
52 km (32 miles) NE (39°) from Ometepec, Guerrero, Mexico
53 km (33 miles) WSW (241°) from Tlaxiaco, Oaxaca, Mexico
76 km (47 miles) SE (138°) from Tlapa, Guerrero, Mexico
148 km (92 miles) W (270°) from Oaxaca, Oaxaca, Mexico
193 km (120 miles) E (83°) from Acapulco, Guerrero, Mexico

Source: USGS

diamondsmith beat me to it


anyway, two big ones. the one in Mexico seems to be a pretty ugly one

Is Obama's daughter still on vacation there? Think they are/were touring Oaxaca.

Magnitude 7.9 (Preliminary magnitude — update expected within 15 minutes)

Date-Time Tuesday, March 20, 2012 at 18:02:53 UTC Tuesday, March 20, 2012 at 12:02:53 PM at epicenter Location 17.041°N, 98.115°W

Depth 10 km (6.2 miles) set by location program

Region GUERRERO, MEXICO

Distances 52 km (32 miles) NE (39°) from Ometepec, Guerrero, Mexico 53 km (33 miles) WSW (241°) from Tlaxiaco, Oaxaca, Mexico 76 km (47 miles) SE (138°) from Tlapa, Guerrero, Mexico 148 km (92 miles) W (270°) from Oaxaca, Oaxaca, Mexico 193 km (120 miles) E (83°) from Acapulco, Guerrero, Mexico

Location Uncertainty Error estimate not available

Parameters NST= 13, Nph=0, Dmin=0 km, Rmss=0 sec, Gp=187°, M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B Source NOAA Pacific Tsunami Warning Center Event ID pt12080001

source(earthquake.usgs.gov...

Strong

reply to post by murkraz


Source would be nice

reply to post by -W1LL

Magnitude 7.9 - GUERRERO, MEXICO

Earthquake Details
This event has been reviewed by a seismologist.
Magnitude 7.9 (Preliminary magnitude — update expected within 15 minutes)
Date-Time Tuesday, March 20, 2012 at 18:02:53 UTC
Tuesday, March 20, 2012 at 12:02:53 PM at epicenter

Location 17.041°N, 98.115°W
Depth 10 km (6.2 miles) set by location program
Region GUERRERO, MEXICO
Distances 52 km (32 miles) NE (39°) from Ometepec, Guerrero, Mexico
53 km (33 miles) WSW (241°) from Tlaxiaco, Oaxaca, Mexico
76 km (47 miles) SE (138°) from Tlapa, Guerrero, Mexico
148 km (92 miles) W (270°) from Oaxaca, Oaxaca, Mexico
193 km (120 miles) E (83°) from Acapulco, Guerrero, Mexico

Location Uncertainty Error estimate not available
Parameters NST= 13, Nph=0, Dmin=0 km, Rmss=0 sec, Gp=187°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=B
Source NOAA Pacific Tsunami Warning Center

Event ID pt12080001

AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 1803Z 20 MAR 2012
COORDINATES - 17.0 NORTH 98.1 WEST
DEPTH - 10 KM
LOCATION - GUERRERO MEXICO
MAGNITUDE - 7.8

EVALUATION

A DESTRUCTIVE WIDESPREAD TSUNAMI WAS NOT GENERATED BASED ON
EARTHQUAKE AND HISTORICAL TSUNAMI DATA. HOWEVER, THERE IS THE
POSSIBILITY OF SOME LOCAL TSUNAMI EFFECTS. THIS EARTHQUAKE IS
LOCATED INLAND FROM THE COAST.

THIS WILL BE THE ONLY BULLETIN ISSUED FOR THIS EVENT UNLESS
ADDITIONAL INFORMATION BECOMES AVAILABLE.

Source

Sorry about the caps - that is just the way it is

What a HUGE difference between USGS and EMSC!!

7.6 and 6.4.. this is crazy

reply to post by -W1LL

wow I had an odd feeling about this quake and I found it on a news site when looking for it... odd dont ask me why...

I am little bit surprised by this one.

reply to post by Hellas

anyway, two big ones. the one in Mexico seems to be a pretty ugly one

I hope everyone will be ok there.

reply to post by murkraz


not showing on LISS yet, but thats sure going to mess up the graphs globally for a day or so.
Aftershocks should be in the 6 range, maybe
LISS

There's your 188 day quake .

Originally posted by diamondsmith
reply to post by -W1LL

 

wow I had an odd feeling about this quake and I found it on a news site when looking for it... odd dont ask me why...

I am little bit surprised by this one.

you and I both man I ma stunned I hope there wasnt too much damage but I had a bad feeling decided to check for quakes and wow i just hope for the people there, most of the buildings probably werent built to handle a quake of this size

reply to post by diamondsmith


Some towns right on top of that one. Not good.

No technical details yet.