ball lightning baltic sea anomaly plague of athens unidentified submerged object 1808 mystery eruption mysteries patomskiy crater 1465 mystery eruption la mancha negra fractional quantum hall effect transient lunar phenomenon flyby anomaly hollinwell incident long delayed echo i p t f14hls list of unexplained explosion events lunar swirls unidentified sounds a s a s s n- v j213939.3-702817.4 s d s s j1240+6710
Nature_Phenomena