KGMB9 has made multiple calls, but so far what caused a jolt on Oahu's North Shore Tuesday night, is a mystery.

Several families in Pupukea say they felt a jolt just before 10 that night.

Kate from Waimea Bay wrote, "We felt our home shake 3 consecutive times. It felt like a small earthquake."

Kim from Mokuleia wrote "it was felt very strongly here, and we suspect the military had something to do with it. it was just one large jolt and did not feel like an earthquake."

Lindsey from Laie felt it too, and wrote "I felt something here in Laie. Makes me wonder if seeing 4-5 busloads of military going toward Kahuku had anything to do with it."

Other callers reported everything from hearing giant booms on the North Shore, to wondering if it was a sonic boom. One even told us he thought it was an unusually loud fireworks show at Aloha Tower.

KGMB9 has checked with the Pacific Tsunami Warning Center and the United States Geological Survey, but found no record of an earthquake. KGMB9 also called the Honolulu Fire Dept., Honolulu Police, Oahu Civil Defense, Hawaiian Electric Company, and the Board of Water Supply. So far none of those agencies know what it may have been.

KGMB9 did speak to the Army and Air Force. Both say they had no training exercises that night. KGMB9 is still waiting for calls back from the Marines, Navy, and Air National Guard.