Calculating tsunami risk for the US East Coast

Apr 19, 2013

The greatest threat of a tsunami for the U.S. east coast from a nearby offshore earthquake stretches from the coast of New England to New Jersey, according to John Ebel of Boston College, who presented his findings today at the Seismological Society of America 2013 Annual Meeting.

The potential for an East Coast tsunami has come under greater scrutiny after a 2012 earthquake swarm that occurred offshore about 280 kilometers (170 miles) east of Boston. The largest earthquake in the 15-earthquake swarm, most of which occurred on April 12, 2012, was magnitude (M) 4.0.

In 2012 several other earthquakes were detected on the edge of the Atlantic of North America, with magnitudes between 2 and 3.5. These quakes occurred off the coast of southern Newfoundland and south of Cape Cod, as well as in the area of the April swarm. All of these areas have experienced other in the past few decades prior to 2012.

The setting for these earthquakes, at the edge of the continental shelf, is similar to that of the 1929 M7.3 Grand Banks earthquake, which triggered a 10-meter tsunami along southern Newfoundland and left tens of thousands of residents homeless.

Ebel's preliminary findings suggest the possibility than an earthquake-triggered tsunami could affect the northeast coast of the U.S. The evidence he cites is the similarity in tectonic settings of the U.S. and the major Canadian earthquake in 1929. More research is necessary, says Ebel, to develop a more refined hazard assessment of the probability of a strong offshore earthquake along the northeastern U.S. coast.

Explore further: Geosciences lecturer dives deep into abyss on Pacific expedition

More information: Presentation title: "The hazard of offshore earthquakes and tsunami along the U.S. east coast" by John Ebel

add to favorites email to friend print save as pdf

Related Stories

Geological evidence for past earthquakes in Tokyo region

Jan 31, 2012

In 1923, a magnitude 7.9 earthquake devastated the Tokyo area, resulting in more than 100,000 deaths. About 200 years earlier, in 1703, a magnitude 8.2 earthquake struck the same region, causing more than 10,000 deaths.

Chilean Earthquake Triggers Smaller Than Expected Tsunami

Mar 01, 2010

(PhysOrg.com) -- While a huge earthquake off the coast of Chile triggered a tsunami that moved at the speed of a jet aircraft across the Pacific Ocean Feb. 27, the event was smaller scientists expected, said a University ...

Ill. earthquake a wake-up call

Apr 20, 2008

A U.S. seismologist said the earthquake that jolted the Midwest Friday is a reminder of the risks seismic events pose outside familiar quake areas.

Recommended for you

Hurricane churns towards Bermuda, to impact US

15 hours ago

A strengthening Hurricane Cristobal had Bermuda in its sights Tuesday, US meteorologists said, warning of heavy rain, high winds and life-threatening rip currents in Florida and beyond.

TRMM and Aqua satellites gaze into Hurricane Cristobal

15 hours ago

NASA's TRMM and Aqua satellites have been providing views of the outside and inside of Hurricane Cristobal as it heads for Bermuda. The National Hurricane Center posted a Tropical Storm Watch for Bermuda ...

Satellite shows Hurricane Marie about to swallow Karina

15 hours ago

Massive Hurricane Marie appears like a giant fish about to swallow tiny Tropical Depression Karina on satellite imagery today from NOAA's GOES-West satellite. Karina, now a tropical depression is being swept ...

NASA sees huge Hurricane Marie slam Socorro Island

15 hours ago

NASA's Terra satellite passed over Hurricane Marie when its eye was just to the west of Socorro Island in the Eastern Pacific. Marie's eye may have been near the island, but the storm extended several hundreds ...

Hurricane Marie weakens off Mexico

17 hours ago

Hurricane Marie, which briefly reached the highest possible category five destructive power, is still potent but weakening in the Pacific off Mexico, weather officials said Tuesday.

User comments : 0