Three of Sweep Pattern
on Jul 19, 2004
from USGS

July 19, Petropavlovsk, Russia	July 19, Black Hills, South Dakota, USA
July 19, Ulaanbaatar, Mongolia	July 19, San Juan, Puerto Rico
July 19, Lusaka, Zambia	July 19, Tepich, Yucatan, Mexico

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.