Originally posted by HarmoniusOne
Originally posted by magickalworld
There were a bunch of quakes off the coast of Honshu, Japan yesterday; that may be the activity that all the sites are picking up....They have been having hundreds of aftershocks.....Magick
Thanks Magick. I had seen that but I'm having a hard time with the concept that a M 6.9 could show up all over the world. Even a M 9 in Japan shouldn't show up on the other side of the planet unless perhaps it was related to volcanic activity *and* all the places it showed in were volcanic *and* the magma could carry the vibrations from the quake. Does anyone know if this is even theoretically possible? I know that Mt Fuji is near Honshu but it doesn't seem to be related to the quakes.
This is right from the USGS website:
Earthquakes with magnitude of about 2.0 or less are usually call microearthquakes; they are not commonly felt by people and are generally recorded only on local seismographs. Events with magnitudes of about 4.5 or greater - there are several thousand such shocks annually - are strong enough to be recorded by sensitive seismographs all over the world. Great earthquakes, such as the 1964 Good Friday earthquake in Alaska, have magnitudes of 8.0 or higher.
I have received 7 e-mails from the USGS since yesterday stating that there were earthquakes off the coast of Honshu, Japan, and their magnitudes ranged from 5.5 - 6.9.....Hundreds of other aftershocks were probably all in the 4.5 - 5.5 range.....I'm not saying that all the quakes on the seismometers were from the Japan quake, but some of them definitely were.