Earth Observatory Blog

Submitted on 14 Nov 2018 by:

On Sunday (29 July 2018), I learnt about the strong 6.4-magnitude (M) earthquake in Lombok, Indonesia. As we have friends living there, I wanted to visit to see what aid we could organise for the people there. So my husband and I went to Lombok with some friends, and we linked up with other humanitarian aid groups to visit the Sembalun area, which is about 1,000 metres above sea level, at the foothills of Mount Rinjani, one of the most scenic volcanoes in the world.

 

At about 6.46 pm the following Sunday (5 August 2018), just as we had finished a meeting to prioritise the relief needs, an earthquake suddenly occurred. It was my first time experiencing a quake, and it really shook the foundations of what I knew about them.

I realised I had many...

Submitted on 10 Oct 2018 by:

Published in Nature Geosciences on 1 October 2018, new research by a team of scientists from the Victoria University of Wellington and the Earth Observatory of Singapore (EOS) has revealed how understanding the events leading up to the 2016 Kaikoura earthquake may lead to a different approach to forecasting earthquakes.

The Kaikoura earthquake, which measured Mw 7.8 in magnitude, had struck the South Island of New Zealand in 2016. It resulted in a rupture that stretched over 200 kilometres (km), ripping through 21 faults – a world record for the most number of faults observed to rupture in a single earthquake event.

It is now rightly regarded as the most complex earthquake ever to be studied, and has...

Submitted on 15 Aug 2018 by:

A one-metre rise in sea level could dramatically increase the frequency of flooding up to almost five times for tsunami-safe Macau, in a new study led by scientists from Nanyang Technological University, Singapore (NTU Singapore). 

The team of scientists from NTU’s Earth Observatory of Singapore (EOS) and Asian School of the Environment (ASE), used computer modelling, and initially showed that Macau, a densely populated coastal city in China, is relatively safe from tsunamis as it requires an earthquake larger than 8.8-magnitude to cause widespread tsunami floods.

However, with just a sea level rise of 0.5 metres, the tsunami-induced flood risk increases to up to 2.4 times and with a 1 metre rise, up to 4.7 times. 

The increased flooding frequency was...

Submitted on 12 Jan 2018 by:

Very early in the morning on Friday, 12 January 2018, Myanmar was struck by a magnitude-6.0 earthquake. Residents in the two capital cities, Yangon and Nay Pyi Taw, were able to feel the quake that had originated 40 kilometres west of the Sagaing Fault in Central Myanmar.

In the video below, Dr Wang Yu, a Research Fellow at the Earth Observatory of Singapore, suggests that today’s earthquake is a reminder of how active the Sagaing Fault actually is. 

Submitted on 26 Oct 2017 by:

On 25 April 2015, a 7.8-magnitude earthquake struck Nepal, destroying buildings and infrastructure across 31 of Nepal’s 70 districts. Approximately 9,000 people lost their lives to the earthquake that day, 22,000 suffered from injuries, and eight million were affected.

I arrived in Kathmandu one week after the quake, as part of the World Bank disaster risk management team, to support the government of Nepal in various response and recovery activities.

In the days before getting on the plane, I worked with the Stanford Urban Resilience Initiative to develop an initial earthquake impact estimate, based on an impact model I had already developed for Nepal.

I had been researching the seismic risk of Kathmandu for my PhD at Stanford. More specifically, I was...

Submitted on 24 Oct 2017 by:

Our Earth is warming. In fact, the planet’s average temperature has risen by 0.6°C over the past century, and is projected to rise another 2 to 6°C over the next hundred years. Small changes in the average temperature of the planet can translate to large and potentially dangerous shifts in climate and weather.

The evidence is clear. Rising global temperatures have been accompanied by notable changes in weather and climate. Many places have seen changes in rainfall, resulting in more floods, droughts, or intense rain, as well as more frequent and severe heat waves. The planet's oceans and glaciers have also experienced major changes – oceans are warming and becoming more acidic, ice caps are melting, and sea levels are rising.

Sea-level rise is one of the more...

Submitted on 05 Jun 2017 by:

A new study from the Earth Observatory of Singapore (EOS) sheds new light on the 2015 Sabah earthquake. Published on 9 March 2017 in Geoscience Letters, the research paper provides a complete analysis of the quake and explains how it triggered the deadly landslides that killed seven children. It also finds that the fault system responsible for the quake has the potential to produce a magnitude-7.0 rupture, or larger, in the future. 

The magnitude-6.0 earthquake in Sabah was devastating mostly because it triggered landslides on Mount Kinabalu, the highest mountain standing in Southeast Asia. The landslides killed 18 hikers and injured at least 21 more.

The quake came...

Submitted on 11 Mar 2017 by:

The devastating 2011 Tohoku earthquake in northeastern Japan was a record-breaker on many levels. The magnitude-9.0 quake was Japan’s largest recorded and the world’s fourth biggest earthquake since 1900. Most terribly, it unleashed a 39-metre high tsunami, killing almost 16,000 people and causing a nuclear meltdown at Fukushima Daiichi Nuclear Power Plant.

The earthquake had effects on a global scale. Seismic waves caused icebergs to break off in Antarctica, water in Norwegian fjords to splash back and forth, and wreckage from the tsunami washed up along the North American coastline. Another global consequence? The quake shortened Earth’s day by 1.8 microseconds (µs) and shifted its figure axis by 17 centimetres (cm). 

Just to clear things up, our planet...

Submitted on 29 Nov 2016 by:

In the night of 21 November 2016 (local time), Japan was struck by a magnitude-6.9 earthquake. This was soon followed by a M 5.6 quake in New Zealand’s North Island, which sparked speculation that the event in Japan had triggered the one in New Zealand. 

Dr Wang Yu, a Research Fellow at the Earth Observatory of Singapore, appeared on Channel NewsAsia’s morning news programme, on 22 November 2016, to explain both earthquake events, as well as clarify whether or not this is an indication of more large earthquakes to come.

Below is a short summary of the Q&A segment between Dr Wang and host, Christine Chan:

Q: First Japan, then New Zealand. Are we seeing an awakening of the Ring of Fire?

The Ring of Fire never rests. If we look at historical...