Daily Bulletin


The Conversation

  • Written by The Conversation
imageOn top of the devastation following the first earthquake, a second has hit.EPA

The second earthquake to hit Nepal in less than a month caught local disaster relief agencies unaware and, despite being six times weaker than the massive quake on April 25, it is still thought to have caused hundreds of casualties.

The magnitude 7.3 that struck around 80km (50 miles) east of Kathmandu resulted from the same tectonic forces as the larger earthquake just over a fortnight before, caused by the Indian plate thrusting beneath the Eurasian tectonic plate along the front of the Himalayas.

While the earthquake could not have been predicted, geophysicists had noted that the fault that slipped on April 25 was weaker than might have been expected. It was not the “great Himalayan earthquake” that had been anticipated by some.

The latest large quake has been linked to stress after the first, which passed eastward along the fault system, running in front of the Tibetan plateau. In a domino effect, stress transferred along to a separate section of the rupture that has now been triggered as an earthquake.

Weaker but still fatal

Although weaker the previous quake, it was, nevertheless, of a similar magnitude to the Haiti earthquake of 2010, which killed more than 100,000 people.

imageEstimated population affected where the earthquake struck.USGS

Many buildings of un-reinforced brick and mud, were already weakened by the recent shakes. The earlier quake also generated secondary hazards such as landslides and liquefaction, the weakening and softening of soil following an earthquake, that might well have increased the damage in this second quake.

Photographers travelling with a US medical team captured the second quake on camera.

The United States Geological Survey has issued an impact assessment, rating the event as “severe” in the worst-affected area. It states that the quake will have caused significant casualties, with estimated fatalities sadly likely to reach a total of hundreds or more.

imageOrange alert level for shaking-related fatalities. Past events with this alert level have required a regional or national level response.USGS

Moving east

Andy Hooper, professor of geophysics and geodesy (the science that enables global positioning) at Leeds University said that the earthquake started at the eastern edge of where the fault slip reached during the 7.8 magnitude event of two and a half weeks ago. “The fault appears to have ruptured mainly eastwards and can be considered as a further unzipping of the locked fault” he said. “We do not have measurements yet, but because the fault slip in this earthquake occurred farther east, it may well have caused a significant drop in the height of Mount Everest.”

imageYellow alert level for economic losses. Some damage is possible. Estimated economic losses are 0-1% GDP of Nepal.USGS

Yani Najman, Himalayan geologist at the Lancaster Environment Centre at Lancaster University, said there was little or nothing that could be done to stop earthquakes occurring in this region. “However, loss of life in future events can be reduced with stronger buildings, less likely to collapse,” he said. Najman added that when Nepal embarks on a a major phase of rebuilding, it should also be a time for education in the country, “promoting simple measures to ensure that housing is as well-built as it can be, taking into account also the limited resources available to people.”

Disclosure

Simon Redfern receives funding from NERC

Authors: The Conversation

Read more http://theconversation.com/many-feared-dead-as-second-quake-hits-devastated-nepal-41712

Writers Wanted

New modelling finds investing in childcare and aged care almost pays for itself

arrow_forward

Review: Robert Dessaix on growing older well — a genial journey through a rich inner world

arrow_forward

The Conversation
INTERWEBS DIGITAL AGENCY

Politics

Prime Minister Interview with Kieran Gilbert, Sky News

KIERAN GILBERT: Kieran Gilbert here with you and the Prime Minister joins me. Prime Minister, thanks so much for your time.  PRIME MINISTER: G'day Kieran.  GILBERT: An assumption a vaccine is ...

Daily Bulletin - avatar Daily Bulletin

Did BLM Really Change the US Police Work?

The Black Lives Matter (BLM) movement has proven that the power of the state rests in the hands of the people it governs. Following the death of 46-year-old black American George Floyd in a case of ...

a Guest Writer - avatar a Guest Writer

Scott Morrison: the right man at the right time

Australia is not at war with another nation or ideology in August 2020 but the nation is in conflict. There are serious threats from China and there are many challenges flowing from the pandemic tha...

Greg Rogers - avatar Greg Rogers

Business News

Top 3 Accident Law Firms of Riverside County, CA

Do you live in Riverside County and faced an accident and now looking for a trusted Law firm to present your case? If yes, then you have come to the right place. The purpose of the article is to...

News Co - avatar News Co

3 Ways to Keep Your Business Safe with Roller Shutters

If you operate your business in a neighbourhood or city that is not known for being a safe environment, it is not surprising if you often worry about the safety of your business establishments o...

News Co - avatar News Co

Expert Tips on How to Create a Digital Product to Sell on Your Blog

As the managing director of a growing talent agency, I use the company blog to not only promote my business but as a way to establish ourselves as an authority in our industry. You see, blogs a...

Adam Jacobs - avatar Adam Jacobs



News Co Media Group

Content & Technology Connecting Global Audiences

More Information - Less Opinion