Complex sentence: Some writers have explained the crucifixion darkness in terms of sunstorms, heavy cloud cover, the aftermath of a volcanic eruption, or a khamsin dust storm that tends to occur from March to May.
Split into simpler sentences: Some writers have explained the crucifixion darkness in terms of sunstorms, heavy cloud cover, or the aftermath of a volcanic eruption. Another possible natural explanation is a khamsin dust storm that tends to occur from March to May.