Quake Watch 2004, page 7


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reply posted on 24-10-2004 @ 06:15 PM by magickalworld
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.


Harmony,

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.


reply posted on 19-12-2004 @ 01:09 PM by ArMaP
Originally posted by Valhall
The Quake Analysis has been updated through 12/15:

Quake Analysis


That includes this week's earthquake, that I felt while I was lunching.

It was one of the strongest earthquakes I ever felt, it was a 5.4 in the Richter scale and it was felt as a 4 in the modified Mecalli scale here in the Lisbon region.


reply posted on 26-12-2004 @ 07:03 AM by Valhall
The Quake Analysis has been updated through 12/22:

Quake Analysis

Please note this data is only through 12/22. With the extreme activity happening in the past 24 hours all red bars (estimates for year-end total activity) are LOW.
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