Second deadly quake hits southern Japan, aftershocks hinder rescue efforts
At least 20 killed in latest shock, some trapped; no irregularities reported at nuclear facilities in area.
Evacuated residents gather at Shirakawa park after an earthquake in Kumamoto, southern Japan, in this photo taken by Kyodo April 16, 2016.(photo credit: REUTERS)ByELAINE LIES, SHINICHI SAOSHIRO/REUTERSUpdated: