Magnitude 6.1 - HAITI REGION

[Shiloh]

Source: http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010rsbb.php

Magnitude 6.1 - HAITI REGION
2010 January 20 11:03:44 UTC


Earthquake Details
Magnitude 6.1
Date-Time

* Wednesday, January 20, 2010 at 11:03:44 UTC
* Wednesday, January 20, 2010 at 06:03:44 AM at epicenter
* Time of Earthquake in other Time Zones

Location 18.428?N, 72.875?W
Depth 9.9 km (6.2 miles) (poorly constrained)
Region HAITI REGION
Distances 60 km (35 miles) WSW of PORT-AU-PRINCE, Haiti
95 km (60 miles) ENE of Les Cayes, Haiti
160 km (100 miles) SSW of Cap-Haitien, Haiti
1110 km (690 miles) SE of Miami, Florida
Location Uncertainty horizontal +/- 6.5 km (4.0 miles); depth +/- 25.7 km (16.0 miles)
Parameters NST=126, Nph=128, Dmin=178.1 km, Rmss=1.02 sec, Gp= 65?,
M-type=(unknown type), Version=6
Source

* USGS NEIC (WDCS-D)

Event ID us2010rsbb

 

[Missouriwatcher]

Re: Magnitude 6.1 - HAITI REGION

"The 6.1-magnitude aftershock was about 6.2 miles deep, with an epicenter about 35 miles (60 kilometers) west-southwest of the capital Port-au-Prince, the U.S. Geological Survey said....At least one injury was reported in the moments after the aftershock, which struck at 6:03 a.m. ET..."
http://us.cnn.com/2010/WORLD/americas/01/20/haiti.earthquake/index.html?hpt=C1

 

[Pathfinder]

Re: Magnitude 6.1 - HAITI REGION

Experts: Haiti at Risk for Another Big Aftershock

By MALCOLM RITTER AP Science Writer
NEW YORK January 20, 2010 (AP)

Haiti can expect more aftershocks in coming weeks, and while the usual pattern suggests they will become weaker and less frequent, another one as strong as Wednesday's jolt is certainly possible, scientists say.

The battered nation has felt more than 45 significant aftershocks since the Jan. 12 quake. Wednesday's event, originally estimated at magnitude 6.1 but later revised to a 5.9, tied an earlier aftershock as the strongest so far.

These events are a sign the land is adjusting to "the new reality of the rock layers," said Bruce Pressgrave, a geophysicist with the U.S. Geological Survey.

Eric Calais of Purdue University, who has studied earthquake potential in the region, said aftershocks could continue for several weeks and that another jolt as strong as Wednesday's would not be surprising.

"They will be less and less frequent, but large ones can still strike," he said. So buildings are still at risk, especially those already weakened, he said.

Julie Dutton, a USGS geophysicist, agreed that more aftershocks are probable and that another event like Wednesday's was certainly possible.

"More likely we see that the earthquakes decrease in size, but you definitely have the potential that you can have a larger earthquake," she said.
Paul Mann of the University of Texas said it's hard to predict whether another sizable quake is in the future, since "we are dealing with a natural system that is very complex."

Calais also said the fault zone responsible for last week's quake extends into the neighboring nation, the Dominican Republic. It's "somewhat of a concern to us" that that the Haiti quake may have raised the chances for a quake there. The two countries share the island of Hispaniola.


Full article at:
http://abcnews.go.com/Technology/wireStory?id=9611586

 

[AlaskaDenise]

Re: Magnitude 6.1 - HAITI REGION

"More likely we see that the earthquakes decrease in size, but you definitely have the potential that you can have a larger earthquake," she said.

As an example, on 23 October 2002, there was a 6.7 EQ on the Denali fault, followed by a 7.9 EQ 23 km further east on 3 November. (see: http://pubs.usgs.gov/fs/2003/fs014-03/)

.