How about you tell us what the sounds really were, how they happen, what causes them......This would mean going there, with recording equipment, and seismic equipment.
After you post your results, we will compare them to the experts and decide whom is correct.
What do you want all of this to be?
Obviously no matter what answer you get, you will call BS........So, what would you like it to be?
Or, what do you think it is?/ was? ......And what do you have to support what you think it was?