7.4 MAG South Atlantic

Globe with Earthquake Location
M7.4 - SOUTH GEORGIA ISLAND REGION

Magnitude 7.4
Date-Time
19 Aug 2016 07:32:23 UTC
19 Aug 2016 05:32:23 near epicenter
18 Aug 2016 23:32:23 standard time in your timezone
Location 55.339S 31.939W
Depth 10 km
Distances
316 km (195 mi) ESE of Grytviken, South Georgia and the South Sandwich Islands
2297 km (1424 mi) ESE of Ushuaia, Argentina
2472 km (1532 mi) ESE of Puerto Deseado, Argentina
2478 km (1536 mi) ESE of Rio Gallegos, Argentina
1754 km (1087 mi) ESE of Stanley, Falkland Islands
Location Uncertainty Horizontal: 8.6 km; Vertical 1.8 km
Parameters Nph = 124; Dmin = 315.4 km; Rmss = 1.10 seconds; Gp = 23°
Version =
Event ID us 10006exl
For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Survey

earthquake.usgs.gov...

---- fairly big one for the region, although I'm not sure how concerning it is.
No tsunami warnings issued thus far and not located on land

That's a big one.. lucky it was far enough out to sea... as you say I am seeing no tsunami warnings.

Hope nothing serious comes from it.

I'd hate to be a ship in that area right now.

a reply to: ObjectZero

Me too, but I thought that the big waves would be more where that hopefully virtual ship isn't right now.

We were in a small boat in a small lake in Alaska when a small quake hit. It was a tiny jolt with a tiny noise, but it was a very big reminder of how vulnerable we all are, in pretty much all things.

Fishy

a reply to: violet

This is a volcanic island, they are prone to earthquakes. The depth is deep. It may not have been felt. The popuilation of that island and the sandwich islands together is 30.

originally posted by: UKTruth
That's a big one.. lucky it was far enough out to sea... as you say I am seeing no tsunami warnings.

No warnings but some small waves have been observed

From NOAAA site:

EVALUATION
----------

* AN EARTHQUAKE WITH A PRELIMINARY MAGNITUDE OF 7.4 OCCURRED IN
THE SOUTH GEORGIA ISLAND REGION AT 0732 UTC ON FRIDAY AUGUST
19 2016.

* SMALL TSUNAMI WAVES HAVE BEEN OBSERVED.
--------

TSUNAMI OBSERVATIONS
--------------------

* THE FOLLOWING ARE TSUNAMI WAVE OBSERVATIONS FROM COASTAL
AND/OR DEEP-OCEAN SEA LEVEL GAUGES AT THE INDICATED
LOCATIONS. THE MAXIMUM TSUNAMI HEIGHT IS MEASURED WITH
RESPECT TO THE NORMAL TIDE LEVEL.

GAUGE TIME OF MAXIMUM WAVE
COORDINATES MEASURE TSUNAMI PERIOD
GAUGE LOCATION LAT LON (UTC) HEIGHT (MIN)
-------------------------------------------------------------
KING EDWARD POINT U 54.3S 36.5W 0839 0.08M/ 0.3FT 12

originally posted by: ObjectZero
I'd hate to be a ship in that area right now.

Why?

That's certainly a doozy for down there. Not unheard of, IIR, though. Wonder if anywhere on other plates is going to react? Should be interesting to see where another crops up, if at all. Though I'm wondering if this might be a reaction to the biggie in the... where was it, Tonga? Fiji? Not too far back & near one of them. Maybe this one is a plate re-situating itself kind in response of thing.

originally posted by: ObjectZero
I'd hate to be a ship in that area right now.

< scratches head >

I don't think you quite understand how a tsunami works in this case. A couple hundred feet of water depth or deeper & boats are fine. It's the shallow areas where the water has nowhere to go but up the shelf & onto land that is the risky place to be.

a reply to: Nyiah

Yes , it's near other plate boundaries. Couldn't get my pic to upload for illustration. I did wonder if it can set off another plate to move.

PS I need to fix my op link , I see it's a 404

EDIT:

USGS Source :
http://(link tracking not allowed)/2bkV7OC * Info: on.doi.gov...