Earthquakes

earthquakes

A history of "Big Ones"

The last time Chile experienced an earthquake larger than magnitude 8.8 was on May 22, 1960, when a magnitude-9.5 earthquake rocked the South American nation, killing 1,655 people and leaving 2 million people homeless, according to the U.S. Geological Survey. It was the largest earthquake in recorded history. Prior to that, a magnitude-8.5 quake struck central Chile near its border with Argentina on Nov. 11, 1922 — the 13th-largest earthquake on record.

01 Mar 2010

Chile's quake larger but less destructive than Haiti's

On Feb. 27, at 3:34 a.m. local time, a magnitude-8.8 earthquake struck offshore Maule, Chile, 325 kilometers southwest of the capital, Santiago. The quake released 500 times more energy than the magnitude-7.0 earthquake that hit Haiti on Jan. 12, according to the U.S.

01 Mar 2010

Voices: Should science dictate whether to rebuild after a natural disaster?

Move Port-au-Prince? Maybe. San Francisco and New Orleans? Never.

It is common for scientists to call for the relocation of a city to a safer location after it is struck by an earthquake or hurricane. After all, when many cities were built, the nature of the hazard they faced was either unknown or very poorly understood. This is true whether we’re talking about San Francisco, Calif., New Orleans, La., or Port-au-Prince, Haiti. Now that we know the hazards, is it time to relocate a city in a dangerous locale? Port-au-Prince? Yes. San Francisco and New Orleans? No.

24 Feb 2010

Haitian quake no shock to geologists

Although the magnitude-7.0 earthquake that shook Haiti on Jan. 12 was a horrible shock for millions of people in and around the Haitian capital of Port-au-Prince, the event came as no surprise to geologists. For years, scientists familiar with the geology of the region had been warning that the island of Hispaniola, which Haiti shares with the Dominican Republic, was overdue for a major quake.

21 Jan 2010

Haiti devastated by major earthquake

A magnitude-7.0 earthquake struck Haiti at 4:53 p.m. EST on Tuesday, causing widespread damage. The earthquake occurred approximately 15 kilometers southwest of the densely populated capital, Port-au-Prince. Early reports indicate severe devastation. The quake is the largest ever measured in Haiti and yet another of a series of disasters to afflict the poorest country in the Western Hemisphere.

12 Jan 2010

Earthquakes overwhelm Tajikistan, Solomon Islands

A quake in Tajikistan in Central Asia left thousands of people homeless, and earthquakes and a tsunami devastated parts of the Solomon Islands in the South Pacific.

04 Jan 2010

Geomedia: Twitter gives heads-up to users and officials about earthquakes

Twitter stirs up a wide range of reactions — it’s hailed as a vital social networking service by some, despised as the ultimate waste of time by others. But the popular online message board does possess one characteristic that is universally undeniable: speed.

15 Dec 2009

Crystal Ball EARTH: Natural Hazards: Reducing society's risks

The global financial disaster of 2009 has many parallels with catastrophic natural hazards. It struck pretty much without warning, its impact was greatly exacerbated by an incredibly complex system of cascading consequences, and finally, mechanisms supposedly in place to mitigate the worse impacts (regulations, in the case of the financial system) failed. There was awareness that such a meltdown could theoretically occur, but it was considered such a low-probability event that it was evidently not worth planning for.

11 Dec 2009

Report from Ground Zero

How geoscientists aid in the aftermath of environmental disasters

01 Oct 2009

Earthquake rocks Sumatra

Updated on Oct. 1:

A second, magnitude-6.6 earthquake struck southern Sumatra, Indonesia, today at about 8:52 a.m. local time; this time, the epicenter was 215 kilometers southeast of Padang, West Sumatra. The death toll from both events has risen to at least 531 people.

30 Sep 2009

Pages