shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity
the subsurface area where motion of seismic waves is initiated
the area at the surface directly above focus
a crack in the earth's crust resulting from the displacement of one side with respect to the other
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
a bowl-shaped opening at the top of a volcano
a rock fragment launched by eruption
3 areas with Volcanic Activity
subduction zones, sea-floor spreading centers and continental rifting, hotspots.
5 types of Volcanic Landforms
cinder cone volcano, caldera/kettle, shield volcano, plateau basalts/flood basalts, composite/strata volcano
cinder cone volcano
cone shaped, cinder accumulate over time
an interior sunken portion of a shield or of a composite volcano crater
gradually sloped. large but not steep
plateau basalts/flood basalts
accumulation of horizontal flows formed when lava spreads out of elongated fissures. gentle eruptions
sequence of extensive explosive eruptions
a slow-moving type of lava that hardens to form rough chunks
a hot, fast-moving type of lava that hardens to form smooth, ropelike coils
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.