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Mary Bellis

Who Invented the Seismograph?

By April 25, 2008

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dragon jarSeismic waves are the vibrations from earthquakes that travel through the Earth; they are recorded on instruments called seismographs. The first crude seismograph was the dragon jar. The dragon jar was a cylindrical jar with eight dragonheads arranged around its brim; each dragon had a ball in its mouth. Around the foot of the jar were eight frogs, each directly under a dragonhead. When an earthquake happened a ball dropped from a dragon's mouth and was caught by the frog's mouth. Photo credit: LOC
May 7, 2008 at 10:25 am
(1) Ana says:

It is amazing…no wonder I am studeying in China naw…Chinese people had a great nation for the last 5000years…well…not the same after the cultural revolution…

October 22, 2010 at 3:10 pm
(2) anna says:

I think this is Awesome, I went to another website but it was MUCH longer, Although it was longer u have far more information!

October 22, 2010 at 3:12 pm
(3) Anna says:


November 1, 2010 at 1:48 pm
(4) jjjjjjjjj says:

someone tell me who invented the dang thing! COME ON ITS UNDER WHO INVENTED IT!!!

January 24, 2011 at 10:08 am
(5) roland says:

its so amazing information i found. break a leg at all!

January 16, 2013 at 11:17 am
(6) brittany says:

did you inevent the seismograph?
if you didnt who did?

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