Significant Earthquake and Tsunami Events

[Jbop]

Earthquake reported in NY city/New Jersey

Earthquake hits New York City and New Jersey late Saturday

The earthquake’s epicenter was just north of Newark, New Jersey

www.independent.co.uk

 

[bjdeming]

A 1-foot tsunami isn't significant, but this is a good reminder that bad tsunamis can happen out of the blue.



They apparently haven't located the source yet.

Chron.com, among others, took a look at the Gulf's tsunami risk after the recent Kamchatka megathrust quake. Submarine landslides are the black swans here, though this layperson can't discount a volcanogenic one someday from Kick-'em-Jenny or some other firehole -- people tend to overlook volcanoes as tsunami risks, but again, this is an extremely low probability for the Gulf.

 

[bjdeming]

Aha! It was a glacier collapse event.

Bluesky

bsky.app

Correction (my fault): It was a rock slope collapse onto a glacier. Details and links.

 

[bjdeming]

Some images from the site. The landslide did reach water, causing a tsunami that was "just a tad" more than 1 foot high by several tens of feet. Some people reportedly were in the area, including a couple of kayakers who were taken on a wild ride, but there were no casualties reported.

 

[bjdeming]

Tsunami evacuation towers in Japan are awesome. Per the tweet, these were finished four years after the 2011 disaster.



Don't think we have any of those here but I have read that OSU's new earth/marine science buildings along the coast are also built with vertical evacuation in mind.

 

[bjdeming]

The building collapse simulation is the third tweet. (More on the 1985 earthquake.)

X translation:

I got a surprise this Saturday. Mrs. María Malvina contacted me via Facebook about a video I shared years ago of the collapse of the Nuevo León building during the 1985 earthquake. Imagine my surprise when she told me that she was one of the survivors

One can spend an entire lifetime analyzing geologically and mathematically the Earth's phenomena, but it's always good to remember that behind all those terrible photographs there are stories of human beings like you and me.

This is the video that Mrs. Malvina was looking for.

This is the result of a research study conducted by Professor Yoshio Kaneko from Kyoto University, #Japon in 2011 on the collapse of the Nuevo León building in #Tlatelolco during the #sismo of 8.1Mw, #CDMX 1985. The objective of the research was to analyze the causes of the collapse and propose prevention measures for future disasters.

It is concluded that the collapse of the Nuevo León building was due to a combination of factors, such as the deficient building design, the poor state of conservation, the soil amplification effect, and the intensity and duration of the earthquake.In the video, yellow zones are observed that indicate the points where the columns were subjected to great stress, and orange zones that point out the parts of the structure that collapsed. The connection between these zones generated a domino effect that caused the total collapse of the building.Note: let us remember that many of the Tlatelolco buildings were reinforced after the earthquake; these modifications were not completed until 1990 in some cases.