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Introduction
On Wednesday, July 29, 2025, a powerful earthquake with a magnitude of 8.8 struck off Russia's Far Eastern Kamchatka Peninsula. This earthquake generated a significant tsunami.
Where was the earthquake?
The earthquake's epicenter was located approximately 125 km (80 miles) east-southeast of Petropavlovsk-Kamchatsky, a coastal city on Russia's Kamchatka Peninsula, at a shallow depth of 19.3 km (12 miles).
How many people were affected?
The initial reports indicate that several individuals were injured in the Kamchatka region, though no serious injuries have been reported. The earthquake and resulting tsunami led to evacuations in Russia and Japan, and warnings were issued for other Pacific regions, including Alaska, Hawaii, and the U.S. West Coast. The full extent of people affected by evacuations and disruptions is still being assessed.
How is a Tsunami generated?
A tsunami is a series of ocean waves generated by a large and sudden displacement of the ocean. The most common cause is large earthquakes that occur below or near the ocean floor. When the seafloor abruptly deforms due to the movement of tectonic plates, it vertically displaces the overlying water. This displacement creates an enormous bulge of water that then flattens out, generating ripples that race outward in all directions. Other causes can include landslides (both subaerial and submarine), volcanic activity, and rarely, meteorite impacts.
Did the Russian Earthquake generate a Tsunami?
Yes, the 8.8 magnitude earthquake off Russia's Kamchatka Peninsula generated a significant tsunami. Waves up to 4 meters (13 feet) hit parts of the Kamchatka region, and a wave of around 30 centimeters (one foot) was observed in northern Japan. Tsunami warnings and advisories were issued for wide areas of the Pacific, including Hawaii, Alaska, and the U.S. West Coast.
How does it travel?
Once generated, tsunamis travel outward in all directions from their source. Unlike typical wind-driven waves that only affect the ocean's surface, tsunamis propagate through the entire depth of the ocean, from the surface to the seafloor.
How fast does it travel?
In the deep ocean, tsunamis can travel incredibly fast, like a jet plane, at speeds exceeding 500 mph (800 km/h). The speed of a tsunami is dependent on the depth of the water; the deeper the water, the faster it travels. As a tsunami approaches shallower coastal waters, it slows down to speeds of around 20-30 mph (30-50 km/h), but its height significantly increases.
Will the Tsunami it hit Hawaii ?
Yes, a Tsunami Warning was issued for Hawaii, with initial waves expected to arrive around 7:00 PM local time (Tuesday, July 29, 2025). The Pacific Tsunami Warning Center indicated that the tsunami could cause damage along the coastlines of all Hawaiian islands, with waves of 1 to 3 meters (3 to 10 feet) above tide level possible in some coastal areas. Residents in Hawaii were
advised to seek higher ground.
Horizontal or Vertical Evacuation
Horizontal People who can leave the Tsunami Inundation Zone, should do so.
Vertical People who can't leave the Tsunami Inundation Zone should move to highers floors of their appartment building. Based on estimated Tidal Wave size of 3-10 feet, moving to 2nd floor is probabl;y enough, but 3rd floor should be safe. But everything in the Tsunami inundation zone will be under ten foot of water.
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Live News Feed on YouTube a camera on three hawaiian Islands and one Island in japan.
https://www.youtube.com/live/TfpuAwCQmGQ?si=kUA1_g9HR5aq6vP7
The End
@shortsegments
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