Complex sentence: Essex County in New York experienced cryoseisms as late as December 31,2013, and numerous frost quakes again occurred in the Greater Toronto Area around 2:00 AM January 4,2014, and January 7,2014 overnight.
Split into simpler sentences: Essex County in New York experienced cryoseisms as late as December 31,2013. Numerous frost quakes again occurred in the Greater Toronto Area around 2:00 AM January 4,2014, and January 7,2014 overnight.