Complex sentence: Two M5 earthquakes were recorded on the night of 24th August but as yet no signs of eruption have occurred which are visible on the surface, but these are the two strongest events measured in Iceland since 1996.
Split into simpler sentences: Two M5 earthquakes were recorded on the night of 24th August but as yet no signs of eruption have occurred which are visible on the surface. These are the two strongest events measured in Iceland since 1996.