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Mega Tsunami

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Greenland’s 650-foot tsunami leaves a nine-day global seismic footprint
environment10 days ago

Greenland’s 650-foot tsunami leaves a nine-day global seismic footprint

A September 2023 landslide into Greenland’s Dickson Fjord spawned a 650-foot mega-tsunami that roared through a two‑mile fjord and, unusually, set off a global seiche. Seismic sensors worldwide recorded a steady cadence of 92-second pulses for about two weeks, tracing the signal back to the fjord and the landslide-driven wave. Researchers used field measurements, computer modeling, and SWOT satellite data to map the fjord’s geometry and the wave’s behavior, highlight climate‑change–driven glacier melt as a contributing factor, and suggest improved early-warning options for Arctic shipping and communities.

via Earth.com|
#dickson-fjord#environment#greenland
Giant Greenland landslide spawns 650-foot mega-tsunami that rattled global seismographs for days
environment2 months ago

Giant Greenland landslide spawns 650-foot mega-tsunami that rattled global seismographs for days

A September 2023 landslide in Greenland’s Dickson Fjord unleashed a 650-foot mega-tsunami that produced a nine‑day, worldwide seismic pulse detected across oceans; satellite data and models linked the event to fjord geometry and ice loss, highlighting how next‑gen satellites like SWOT can improve Arctic warning systems.

via Earth.com|
#dickson-fjord#environment#greenland
Satellite captures record-breaking Pacific tsunami and global seismic impact
science5 months ago

Satellite captures record-breaking Pacific tsunami and global seismic impact

A massive 650-foot tsunami was triggered by a landslide in Greenland's Dickson Fjord, causing seismic waves detectable worldwide for nine days. This event highlights the increasing risks posed by climate change-induced glacier melting and demonstrates the potential of advanced satellite technology to monitor and understand such extreme natural phenomena. Researchers are now working to improve early warning systems and better predict similar events in the future.

via Earth.com|
#climate-change#earthquake#greenland
Scientists Warn of Potential 1,000-Foot Mega-Tsunami Threat to U.S.
science11 months ago

Scientists Warn of Potential 1,000-Foot Mega-Tsunami Threat to U.S.

Scientists warn that a 1,000-foot mega-tsunami, similar to historical events like the 1958 Lituya Bay surge, could potentially occur in the U.S., especially along the Cascadia subduction zone, posing significant risks to coastal communities and inland areas through land subsidence and large wave generation. Enhanced monitoring and preparedness are crucial to mitigate impacts.

via Earth.com|
#cascadia#disaster-preparedness#earthquakes
Satellite Data Reveals Greenland's 9-Day Mega-Tsunami and Earth's Hidden Seismic Pulse
science11 months ago

Satellite Data Reveals Greenland's 9-Day Mega-Tsunami and Earth's Hidden Seismic Pulse

In 2023, two massive mega-tsunamis in East Greenland's Dickson Fjord, caused by glacier melting due to climate change, generated seismic waves that circled the globe for nine days. Advanced satellite technology from the SWOT mission provided the first direct evidence of these unusual seiches, revealing new insights into climate-driven ocean hazards and emphasizing the importance of next-generation monitoring tools for understanding environmental extremes.

via The Daily Galaxy|
#climate-change#greenland-glaciers#mega-tsunami
Tonga volcanic eruption triggers first mega-tsunami since antiquity.
natural-disasters3 years ago

Tonga volcanic eruption triggers first mega-tsunami since antiquity.

The eruption of the underwater Tonga volcano produced a mega-tsunami nearly the height of a 30-story skyscraper, according to a recent study. The explosion may have been as strong as 15 megatons of TNT, making it about as strong as the United States' largest nuclear detonation, Castle Bravo, in 1954. The eruption released at least five blasts, generating a tsunami up to 279 feet high one minute after the largest explosion. The scientists said the strength of the 2022 eruption rivaled that of the 1883 eruption of Krakatau that killed more than 36,000 people.

via Livescience.com|
#eruption#mega-tsunami#natural-disasters
Tonga volcanic eruption triggers first mega-tsunami since antiquity.
natural-disasters3 years ago

Tonga volcanic eruption triggers first mega-tsunami since antiquity.

The January 2022 eruption of the Hunga Tonga-Hunga Ha'apai submarine volcano near Tonga generated a "mega-tsunami" nearly the height of a 30-story skyscraper, according to a recent study. The eruption may have been as strong as 15 megatons of TNT, making it the largest natural explosion in more than a century. The eruption released at least five blasts, generating a tsunami up to 279 feet high one minute after the largest explosion. The scientists found that the complex, shallow nature of the region's underwater terrain helped to trap low-velocity waves from the eruption, which in turn helped generate a mega-tsunami that lasted more than an hour.

via Yahoo Life|
#coral-reefs#mega-tsunami#natural-disasters