I actually saw very similar damage caused by (believe it or not) a lightning strike! I was doing a turnround inspection and there was an obliterated Radome. Initially I thought it was a birdstrike but the lack of blood and guts proved otherwise. It appeared that due to the position of the radar scanner (it was at 90 degs to the normal) the lightning bolt tracked straight through the radome and earthed at the scanner rather than along the diverter strips, taking the radome with it!. We needed a new radome and radar scanner.