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Many earthquakes are undetected by the USGS; in fact, the organization estimates that around several million earthquakes occur around the globe annually. Annually, an average of one earthquake of a magnitude 8 or higher occurs, while around 15 earthquakes ranging from 7 to 7.9 occur. As many as 1.3 million earthquakes measuring 2 to 2.9 in intensity occur annually. This information is based on observations of data from the year 1900 and beyond. www.reference.com...
Does the Earth really ring like a bell after a big earthquake?
Seismic waves from the biggest earthquakes (over magnitude 8.3) can bounce around inside the earth for up to a month. This makes the earth "ring". However, you need special instruments to hear the ring because the tone is very low — about 1 cycle per hour. Compare this with the 256 cycles per second of middle C on the piano.
Link.
Having caught this, maybe something will happen that you can tie in with Earthquake information.
This makes the earth "ring".
share your knowledge in a positive way
Double Facepalm
originally posted by: TrueAmerican
Not again!
It's called a 7.6 earthquake in Chile. Man, I swear this is getting old.
originally posted by: jadedANDcynical
a reply to: rickymouse
Quake Watch post
USGS linky
Large quakes like this will be picked up by webicorders all over the world.
TA has real time direct access to seismic data to a number of networks and often will post about large quakes prior to them being posted by the USGS or other entities.
a reply to: TrueAmerican
The double face palm is more applicable to you, in my opinion.
It's really sad to see someone who could share their knowledge in a positive way, instead choose to shame or belittle others for not having that same knowledge.
originally posted by: loam
a reply to: TrueAmerican
The double face palm is more applicable to you, in my opinion.
It's really sad to see someone who could share their knowledge in a positive way, instead choose to shame or belittle others for not having that same knowledge.
On the thread topic, it always fascinates me how the planet rings like a bell when a powerful earthquake hits.
On that note (pun intended), here's a little something about that:
Does the Earth really ring like a bell after a big earthquake?
Seismic waves from the biggest earthquakes (over magnitude 8.3) can bounce around inside the earth for up to a month. This makes the earth "ring". However, you need special instruments to hear the ring because the tone is very low — about 1 cycle per hour. Compare this with the 256 cycles per second of middle C on the piano.
Link.