Medium
on Oct 17, 2004
from USGS

Oct 17, Midway Island, Pacific Ocean	Oct 17, Hailar, Neimenggu Province, China
Oct 17, Taipei, Taiwan	Oct 17, Matsushiro, Japan
Oct 17, Yuzhno Sakhalinsk, Russia	Oct 17, 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.