Hazards

Guest Videos: Where and How Big Is The Earthquake?

Have you ever wondered how seismologists locate earthquakes and figure out their magnitude? And, wherever the quake, what controls how much shaking you feel?

Have you ever wondered how seismologists locate earthquakes and figure out their magnitude?

Here is a video about it from New Zealand’s GNS Science:

They changed over from the Richter scale to moment magnitude because there are other factors involved, including physical qualities of the rock that breaks in a quake and – spaghetti?

Of course, the bottom line is what controls the shaking you’re going to feel at any given location.

Here is more information about the USGS Shakemap. Outside the US, check with your local, regional, and/or national geoscience institutions for more information.


Featured image: Damage from a 1976 Guatemala earthquake, by USGS, via Wikimedia.

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About BJ Deming

After getting an associate's degree in forestry, I studied geology as an undergraduate back in the 1980s but went into medical transcription instead. It just worked out better for me. The Internet renewed my interest in geoscience as a hobby, and when I retired in 2014, I decided to write a book about cat evolution. That started a new career for me (enormous fun but not self-supporting yet). Right now, besides blogging I am finishing up the first two books in a self-published ebook series about the cat family and its history. Thanks for your interest!

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