Answer:The actual rupture duration on the fault (the time it took for the
earthquake to take place on the fault and rupture the
entire length) was approximately 3 to 4 minutes. The
exact length of time that people felt the shaking varied
from place to place, depending on their distance to the
fault, and other factors, such as what type of bedrock
they were on, what the crustal structure was below them
and between them and the fault, etc. In northern
Sumatra ,
which lies almost above the fault, shaking may have been
experienced for up to several minutes.
