abstract
activity
amplitude
background
chart
cleft
concept
crack
crash
crisis
curve
damage
danger
design
diagram
disaster
earth
earthquake
effect
fall
fracture
frequency
gap
graph
ground
hit
hollow
isolated
land
line
nature
paper
power
quake
record
red
science
seismic
seismograph
seismometer
sound
split
surface
symbol
technology
template
vibration
wave
waveform
white