Group items tagged

"Today (27-March-2014) during the night three earthquakes took place in Hekla volcano. This were typical earthquakes and like those that have been taking place earlier in March. What this earthquake activity means I do not yet know. The magnitude of this earthquakes was in the range of 0,7 to 0,8 with the depth of 9,7 to 8,3 km"

Japan earthquakes

"Tsunami warning center scientists usually measure an earthquake's "size" with the moment magnitude scale rather than the older but more famous Richter magnitude scale. The moment magnitude scale is better suited for measuring the "sizes" of very large earthquakes and its values are proportional to an earthquake's total energy release, making this measurement more useful for tsunami forecasting. Moment magnitude numbers scale such that that energy release increases by a factor of about 32 for each whole magnitude number. For example, magnitude 6 releases about 32 times as much energy as magnitude 5, magnitude 7 about 32 times as much as magnitude 6, and so on. This animation graphically compares the relative "sizes" of some 20th and 21st century earthquakes by their moment magnitudes (according to USGS/NEIC). Each circle's area represents its relative energy release, its color indicates its tsunami potential (see http://ptwc.weather.gov/ptwc/about_me...), and its label lists its moment magnitude, its location, and the year it happened. ----- Los científicos del centro de alertas de tsunamis miden el "tamaño" de un terremoto utilizando la escala de magnitud de momento y no otras escalas más antiguas y famosas como la escala de magnitud de Richter. La escala de magnitud de momento es más adecuada para medir el tamaño de grandes terremotos, y sus valores son proporcionales a la cantidad de energía liberada, lo cual hace esta medida de magnitud más útil para el pronóstico de tsunamis. Los números en la escala de magnitud de momento escalan de manera que la cantidad de energía liberada se incrementa 32 veces por cada número entero de diferencia. Por ejemplo, un evento con magnitud 6.0 libera cerca de 32 veces más energía que uno de 5.0, y uno de magnitud 7.0 libera 32 veces más energía que uno con magnitud 6.0, etcétera. Esta animación compara gráficamente el tamaño relativo de algunos terremotos ocurridos durante los siglos XX y XXI en término

A new study suggests that two recent earthquakes may indicate a literal seismic shift in our understanding of tectonic plate movements. Massive earthquakes under the Indian Ocean that took place last spring are the largest of their kind ever recorded. The 8.7 magnitude quake, followed by a 8.2 magnitude aftershock, could signal the formation of a new plate boundary under the Earth.

"A powerful earthquake struck the steep hills of China's south-western Sichuan province on Saturday , leaving at least 156 people dead and more than 2,600 injured, nearly five years after a devastating quake wreaked widespread damage across the region."

"Three days after the region of Ya'an in south-west China was rocked by an earthquake, the rescue efforts and clear-up operation are ongoing"

Six Italian scientists and a government official have been found guilty in a watershed trial of multiple manslaughter for underestimating the risks of the L'Aquila 2009 earthquake.

"Two earthquakes within a month have killed thousands in Nepal but there is hope that a new digital model could minimise deaths and devastation"

An earthquake has been strongly felt near Los Angeles, California, rattling nerves but so far causing no major damage, injury or deaths. The 4.4-magnitude quake struck 9km (5.6 miles) from the Los Angeles neighbourhood of Westwood. It hit at 06:25 local time (13:25 GMT), US officials said. It was the strongest earthquake in Los Angeles since the last aftershocks from the 1994 Northridge quake, a government scientist said.

"An earthquake of magnitude 8.2 has jolted northern Chile, triggering a tsunami alert and the evacuation of thousands of people from coastal areas. At least five people were killed and more than 300 women escaped from a coastal prison."

"A powerful magnitude 8.2 earthquake struck off Chile's northern coast on Tuesday night, causing landslides and sparking a tsunami alert that led to an evacuation of coastal areas."

"Around three-quarters of all deaths in earthquakes are due to building collapse - and poor people bear the brunt. As rescue efforts continue in Nepal, Robin Cross argues for safer, more resilient reconstruction"

"Rescue workers have freed a teenage boy from the rubble of a building five days after the earthquake in Kathmandu, and pictures have emerged of a baby who was trapped for more than 20 hours"

"International donors led by India and China have pledged approximately $3bn (£1.91bn) to rebuild Nepal in the aftermath of the devastating earthquakes that hit the country."

"Fears over people trapped in lifts after earthquakes has led the government to consider safeguards including emergency supply of drinking water"

"A magnitude 5.1 earthquake struck suburban Los Angeles on Friday, rattling a wide swathe of southern California. Geologists say the tremor was shallow, at a depth of only 1.2 miles. There were no reports of injury or substantial structural damage from the quake, which was centred outside the city of La Habra, about 20 miles east of downtown LA"

"A strong 6.7-magnitude earthquake shook Chile's northern Pacific shore on Sunday, and authorities said more than 100,000 people were evacuated from some coastal areas as a precaution. Only minor damage was reported."

"A powerful earthquake hit the Sichuan province of China near Ya'an city over the weekend reportedly killing some 200 people. Thousands of rescue workers have been deployed to help feed, treat, and house the displaced residents and help clear roads blocked by landslides in the remote area. The quake comes just short of five years after a massive quake in the same region killed some 70,000 people. -- Lloyd Young ( 46 photos total)"