News Forum - Series of earthquakes strike 500km away from Thailand’s Andaman coast

[Fester]

16 minutes ago, Guest1 said:

That's the reason why I posted it.

Happy to help. ;-)

Looks like the term started in Oz or NZ and adopted in America. So typical of the ex colonies messing about with the language that was so graciously gifted to them.

 

Addition - looks like the Aussies first started using this term in 2009 - so much more recent than me - used to be king prawn before that - maybe they eat them all?

[Fester]

8 minutes ago, Guest1 said:

It is  the same (imho), since the moon is the engine behind the tides!

Tsunamis and earthquakes are not tidal. 

[Guest1]

15 minutes ago, Fester said:

Tsunamis and earthquakes are not tidal. 

We would need to check if there was a strong high tide, on 26 . But in simple words:

Strong high-high tidal stress can cause stronger quakes, as low-low tidal stress (says C. Scholz, Columbia Univ.), because it is/can affect/ing plate tectonics. 

So quakes because of tides, possible, but for  tsunami we would need to check tide times for Fukushima and Sumatra, methinks, to get an idea. 

[Fester]

24 minutes ago, Guest1 said:

We would need to check if there was a strong high tide, on 26 . But in simple words:

Strong high-high tidal stress can cause stronger quakes, as low-low tidal stress (says C. Scholz, Columbia Univ.), because it is/can affect/ing plate tectonics. 

So quakes because of tides, possible, but for  tsunami we would need to check tide times for Fukushima and Sumatra, methinks, to get an idea. 

Nothing to do with it and nothing needs checking. 

I've looked at Scholz. His studies concerning tidal triggering of submarine earthquakes seem to concern  mid-ocean ridge areas, where it is feasible that earthquakes might occur more frequently during low tide but not exclusively. Basically at low tide there is less overburden (weight) of seawater which might allow rapid flow of magma to the ridge/plate boundary and the offset volcanoes nearby, causing both quakes and volcanic eruptions, e.g. Iceland.

But this reasoning does not apply to tectonic subduction zones and major thrust faults.