Why are all Earthquakes So Different? Factors Affecting Earthquakes

Sure, magnitude plays a big role in how severe the impacts of an earthquake are...but there are many more factors that decide just how severe every individual earthquake ends up being. In this video, we'll look at some of those factors in detail using two well-known earthquakes as an example: Haiti in 2010 and Japan is 2011.

[@fai_m22]

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[@robihamdani5203]

Wow thank you for this high quality material

[@jrepka01]

The difference between M7.0 and M9.0 is about 1000x the energy. But magnitude doesn't tell the whole story in terms of how the ground moved. In Haiti the highest intensity of shaking (largest wave amplitudes, ground acceleration) was concentrated in an area of a few thousand square miles, and over a short period of time, about 30-40 seconds. In Japan the highest intensity shaking was spread out over an area hundreds of times larger, and over about 5 minutes.
The early warning systems that worked well in Japan would not have worked at all in Haiti because alarms would at best have begun sounding a mere 2-3 seconds before shaking began.
A good rule of thumb on Great earthquakes (magnitudes 8.5+) is that they affect much larger areas, but their energy is spread out over a larger areas as well as over longer time periods. The most intense shaking in Great earthquakes is not necessarily greater than that in marginally smaller Major earthquakes (magnitudes 7-8).
The nature of plate tectonics is such that Great earthquakes always occur in subduction zones, underwater, and thus always produce tsunamis. In the 2004 Indonesian earthquake the vast majority of the fatalities were associated with the tsunamis generated, and occurred in coastal areas so far from the epicenter that many of the victims were unaware that an earthquake had occurred.

[@1Taymn]

class video mate 🙌🙌

[@Shravbs]

Great video

[@SimpleGeography]

Thank you!

[@lukerickenberg]

Day or night which is worse in your opinion?

[@SimpleGeography]

If you're talking earthquakes, night is typically worse. People are often inside and asleep, meaning they're less able to respond when the earthquake starts and more at risk of being injured or killed.

[@manashvibhati8347]

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[@stevenroshni1228]

I remember when Haiti happened, I knew it was devastating because the news came from USGS sensors. Earthquakes travel slowly enough that in a populated area the news should have enough leadtime to get the memo out first.

[@sgorgeouss]

lovelovelovelovelovelove LOVE this!!

[@uprightape100]

Also, Cholera was brought to Haiti after the quake by Nepalese/UN emergency workers. Ooooopsie. Oh, the Cholera outbreak continues till this very day.

[@tamaradias7761]

How does the time of day affect it i would like to know

[@jasrattariq929]

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[@thierrywende132]

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[@BoppieJotham-fo4pd]

❤