Complex sentence: Başmakçı was badly damaged in an earthquake in August 1892, when 300 homes were destroyed, but no one was killed, as it was harvest time and all were in the fields.
Split into simpler sentences: Başmakçı was badly damaged in an earthquake in August 1892 when 300 homes were destroyed. However, no one was killed, as it was harvest time and all were in the fields.