英和和英

seismic waves

a seismometer

a seismic wave called body wave

a longitudinal earthquake wave called P-wave

a cataclysmic earthquake

an earthquake shockwave called a secondary wave

being where earthquake waves arrive simultaneously

an earthquake of deep origin

an earthquake whose epicenter is right under a certain area of land

the seismograph called strong-motion seismograph

the length of duration of an earthquake as sensed by a seismograph

caused by an earthquake, a gap in the earth

an instrument used to record the data of an earthquake, called seismograph

Earthquake Early Warnings are issued when seismometers catch P waves.