Aftershocks after a major earthquake
A) may continue for days,weeks,or years after the initial earthquake.
B) are equivalent in magnitude to the original earthquake.
C) always occur on the same fault as the original earthquake.
D) typically occur only on reverse faults in subduction zones as a result of high pressures.

Question

Quizplus · Accepted Answer

Aftershocks can continue for a significant period after the main earthquake, ranging from days to months or even years. They are smaller in magnitude than the main earthquake but can still be strong enough to cause damage. Aftershocks can occur on the same fault as the main earthquake or on nearby faults that have been triggered by the initial seismic activity. Reverse faults in subduction zones can generate both main earthquakes and aftershocks, but not all aftershocks occur on these types of faults.

Aftershocks After a Major Earthquake