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Tag » Seismograph
Earthquakes are recorded by instruments called seismographs. A seismograph has a base that sets firmly in the ground and
a heavy weight that hangs free. When an earthquake causes the ground to shake, the base of the seismograph shakes too, but the hanging weight does not. 284 kata lagi
(CBS SF)– A strong 7.8 magnitude quake struck the open ocean, 543 miles south of Tokyo early Saturday morning.
The initial report from seismographs pegged its magnitude at 8.5 but it was later significantly downgraded to a 7.8 quake. 50 kata lagi
KYUSHU, Japan (CBS) – Scientists say they’ve recorded low frequency shaking on the ocean floor that could be the result of increasing pressure, similar to what was released during the devastating 2011 Japan earthquake and tsunami. 204 kata lagi