Roger Musson

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The news of another strong and deadly earthquake in Italy on Wednesday morning sadly comes as no surprise to seismologists.

Likewise the rising death toll, which was 10 with the first reports, rising to 73 by early afternoon local time, as civil defense workers began to reach the smaller settlements in the worst affected areas.

Photographs of villages like Pescara del Tronto, one of the closest villages to the fault, show the odd semi-intact house sticking up like a bad tooth from piles of rubble.

Yet this was an earthquake of magnitude 6.2 -- a strong event, but by no means a great one in global terms.…  Seguir leyendo »

Are earthquakes becoming more frequent? This is a question that every seismologist is used to. I was asked it 30 years ago. Thanks to large quakes in Haiti and Chile — not to mention 7-plus magnitude quakes in Indonesia and Baja California over the past week — I’ve been asked it a lot lately. And the answer is no. You would think this would be good news, but sometimes people seem faintly disappointed when they hear it. It’s as if a dose of disaster makes life more interesting.

It’s true that more earthquakes are recorded than used to be the case, but that’s simply because there are more monitoring stations that are able to pick up minor earthquakes that once went undetected.…  Seguir leyendo »