Complex sentence: The town and surrounding villages were hit by two moderate sized earthquakes within ten years, first Mw 6.0 on May 26,1994 and later moment magnitude (Mw) 6.4 on February 24,2004.
Split into simpler sentences: The town and surrounding villages were hit by two moderate earthquakes within ten years. The second, at moment magnitude (Mw) 6.4, occurred on February 24,2004.