Big
on Dec 18, 2004
from USGS

Dec 18, Matsushiro, JapanDec 18, Ulaanbaatar, Mongolia

Note: Whiplash Sweeps bump first the Dark Twin toward Earth, then the Earth toward Planet X, and within a couple days Planet X hops over the Sweeping Arm thus pushing Earth again, and finally Earth collides again with her Dark Twin behind her.