Undersea Quake

Undersea Quakes Cause Whale Beachings!

The video above was taken after an undersea quake occurred followed by a large aftershock. It’s not too exciting but does show how the water can be disturbed.

The 1929 report below is typical of an undersea quake. You can see a lot more of these eyewitness accounts by visiting seaquake reports 1750s to 1899s and seaquake reports 1900 to present.

Undersea Quake Typical Reported by Ship’s Captain

When about midway between Sydney and Cape Maria van Diemen, the most northerly point of New Zealand, the steamer Aelybryn passed close to two submarine upheavals.Upon the arrival of the steamer in Sydney yesterday from Auckland, Captain R. Stevenson said that at 1.30 p.m. on Sunday, without warning a great surge of white water rose out of the sea a mile and a half away on the port bow. Gradually it assumed a concave formation and it reached a height of between 20 and 30 feet before settlement set in.
Captain Stevenson estimated the width of the water, which must have weighed many thousands of tons, at between 15 and 20 feet.


Fifteen minutes later a second upheaval occurred in almost the same place. In development, size, and subsidence it was practically the same as the first. He explained that there was a south westerly gale at the time and that the steamer’s progress had been reduced to five knots. He said that the rough condition of the sea would account for the fact that no sensation was felt on board. There must have been a terrific upheaval at the bottom of the sea to have caused such results on the surface, said Captain Stevenson: According to the chart the depth at that point was 6,660 feet, or roughly about a mile and a quarter. “You can get some idea from that of the volume of water that was dislodged,” he said.

“The happenings were observed by the second mate and the helmsman, as well as by myself. No other ship was near us and we realized that if we had been on top of one of those walls of water nothing more would have been heard of us.”

Observatory Interest

The report was submitted to the State Observatory on the arrival of the ship in Sydney. The observatory was interested because the report confirmed their view. The earthquake that caused such havoc was closer to Australia than New Zealand. It meant that there was an extensive fault plane in the middle of the Tasman sea.

The motor tanker Brunswick on her way across the Tasman after the earthquake confirmed the event. For more than an hour, she steamed through an immense shoal of dead fish. Apparently killed by the submarine upheaval.

Captain Stevenson excluded any possibility of a waterspout. He had spent a lifetime at sea and had seen many spouts. Before leaving New Zealand on July 3rd, a scientist put forward the view to him that as a result of a submarine upheaval about midway in the Tasman, new land would be thrown up one day. “It is a curious thing,” added Captain Stevenson, “that Sunday’s happenings occurred within 25 miles of the centre of the Tasman and I am now quite prepared to believe him.”