Tag Archives: earthquakes

Earthquake hazard in a 3D world

The latest advances in computing now allow for 3D simulation of wave propagation; techniques simply not available to us previously. This will allow us to better understand the rupture and resulting ground motions of the largest earthquakes in greater detail. … Continue reading →

Earthquakes converse by the transfer of stress: The strong evidence for short-distance, long-period interactions

During the 75 years before the great 1906 earthquake on the San Andreas fault, the San Francisco Bay area suffered at least 14 shocks of moment magnitude (Mw) equal to or exceeding 6; these occurred on all major faults, and … Continue reading →

Earthquake aftershock zones are actually global

Triggering occurs as a result of the redistribution of stress induced by an earthquake. Differentiating triggered events from normal background seismicity is a key objective in studies of earthquake triggering. During the 1990s there was substantial evidence that earthquake sequences, spaced in time and space, are being triggered by the previous events. Continue reading →

How well do we really understand earthquake potential?

The last decade has seen some of the most devastating earthquakes to society, with some 630,000 lives lost since 2000 due to earthquakes and corresponding cascading hazards like tsunamis and landslides—and economic losses of over US$ 500 billion. This could … Continue reading →

After Amatrice: Unlocking seismic hazard. A race against time.

Italy’s earthquake in August raised questions about whether the seismic risk in the region has increased. Amatrice is an area of historical seismic activity where seismic hazard and risk studies carried out a few years ago anticipated that a future … Continue reading →

Questions of coverage in the wake of Italy’s August earthquake

Last week’s earthquake in central Italy raises questions regarding the lack of earthquake insurance take-up and resilience measures, also available techniques for managing earthquake catastrophe accumulations. Continue reading →

Interactive Map of the Nepal Earthquake

Nepal quake

The 2015 Nepal earthquake occurred at 11:56 NST on 25 April, with a moment magnitude (Mw) of 7.8Mw and a maximum Mercalli Intensity of IX (Violent). The quake occurred as the result of tectonic plate movements along the fault line … Continue reading →

Earthquake and Underinsurance: Twin Scourges of Nepal

Reuters: Nepal Earthquake

Nepal is one of the world’s most disaster-prone countries. The recent 7.8 magnitude earthquake, which marked the worst natural disaster to hit Nepal in more than 80 years, is a strong testament to the country’s vulnerability. While the economic losses … Continue reading →

After Tohoku: Re-evaluating Japanese Earthquake Hazard

Japanese Hazard Map_Subduction-zones

The magnitude of the 2011 Tohoku earthquake came largely as a surprise to the seismologist community and revealed certain shortcomings in previous hazard studies. Helping to address this, in 2012 and 2013, the Headquarters for Earthquake Research Promotion (HERP) in … Continue reading →

Our Scariest Personal Risk – New Natural Disasters

Scariest risks 2014

Perhaps the scariest risk we face on a daily basis is the potential for a possible natural disaster at any time. Who would have thought flooding in the desert was a problem, but Tropical Storm Norbert made Arizonans question their … Continue reading →