He thought that this was evidence that the bottom of the ocean had been lifted up by powerful geological forces over long periods of time.

VOA: special.2009.02.25

The United States Geological Survey says it was the fifth largest earthquake since nineteen hundred.

VOA: special.2011.03.12

One island in Vermont, Isle La Motte, is known for its prehistoric geological formations.

VOA: special.2009.01.05

Gregg Swayze works for the United States Geological Survey in Denver,Colorado.

VOA: special.2009.11.17

Tuesday's quake has been followed by a series of aftershocks, which Stuart Sipkin of the U.S.Geological Survey says are pretty typical.

VOA: standard.2010.01.13

And to do that, we need a lot of surveys and geological surveys on water preservation systems.

VOA: standard.2009.10.06

Experts with the U.S.Geological Survey say the earthquake struck about 10 kilometers from Port-au-Prince on Tuesday afternoon.

VOA: standard.2010.01.12

How much damage depends on several factors. Stuart Sipkin is a seismologist at the U.S.Geological Survey.

VOA: standard.2010.01.13

Julie Dutton is a geophysicist with the U.S.Geological Survey: "It is a pretty significant earthquake,"

VOA: standard.2010.01.12

Scientists with the U.S. Geological Survey say the earthquake struck about Tuesday afternoon.

VOA: standard.2010.01.13

By geological standards, this is not what we would call a big eruption."

VOA: standard.2010.04.15

Jakarta itself does not sit on a geological fault line.

VOA: standard.2009.09.07

Julie Dutton is a geophysicist with the U.S.Geological Survey.

VOA: standard.2010.01.13