Where was the epicenter of the 1700 Cascadia earthquake?
1700 Cascadia earthquake
| USGS-ANSS | ComCat |
|---|---|
| Magnitude | 8.7–9.2 Mw |
| Epicenter | 45°N 125°WCoordinates:45°N 125°W |
| Fault | Cascadia subduction zone |
| Type | Megathrust |
What tectonic plates were involved in the 1700 Cascadia earthquake?
The Cascadia fault is the boundary between two of the Earth’s tectonic plates: the smaller offshore Juan de Fuca plate that is sliding under the much larger North American plate. The earthquake shaking collapsed houses of the Cowichan people on Vancouver Island and caused numerous landslides.
Where is the Cascadia fault line located?
The Cascadia Subduction Zone is a 600-mile fault that runs from northern California up to British Columbia and is about 70-100 miles off the Pacific coast shoreline.
Why did the 1700 Cascadia earthquake happen?
The 1700 tsunami that impacted the Puget sound region was triggered by a megathrust earthquake off the coast of northern California, Oregon, Washington, and British Columbia on the so-called Cascadia margin. The event happened on the evening of January 26th as documented in Japanese historic records.
How long did the 1700 Cascadia earthquake last?
Such an earthquake would have ruptured the earth along the entire length of the 1000 km (~600 mi) long fault of the Cascadia Subduction Zone and severe shaking could have lasted for 5 minutes or longer.
How far away will Cascadia earthquake be felt?
More Videos. The shaking will be felt for hundreds of miles – from the coast all the way inland to Boise, Idaho, even to the southeast toward Sacramento in California. As one section of the sea floor drops, so will the ocean water above it creating a massive tsunami that will inundate low-lying coastal communities.
How far is Cascadia Earthquake Felt?
The shaking will be felt for hundreds of miles – from the coast all the way inland to Boise, Idaho, even to the southeast toward Sacramento in California. As one section of the sea floor drops, so will the ocean water above it creating a massive tsunami that will inundate low-lying coastal communities.
What would Cascadia tsunami?
A nearby earthquake could drop the low-lying regions of the coast several feet below sea level. The highest tsunami waves could reach 25 m (80 ft) and severely flood coastal communities near beaches, bay mouths, and low-elevation coastal plains.
How long is a 9.0 earthquake?
five minutes
A magnitude 9.0 earthquake can last for five minutes or longer, and the amount of energy released is about 1,000 times greater than that of a 7.0.
What was the size of the 1700 Cascadia earthquake?
The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26, 1700, with an estimated moment magnitude of 8.7–9.2. The megathrust earthquake involved the Juan de Fuca Plate from mid- Vancouver Island, south along the Pacific Northwest coast as far as northern California.
Is there any evidence of the 1700 earthquake in Japan?
Evidence. The earthquake took place at about 21:00 Pacific Time on January 26, 1700 ( NS ). Although there are no written records for the region from the time, the timing of the earthquake has been inferred from Japanese records of a tsunami that does not correlate with any other Pacific Rim quake.
What happened at the Cascadia fault?
The Cascadia fault is the boundary between two of the Earth’s tectonic plates: the smaller offshore Juan de Fuca plate that is sliding under the much larger North American plate. The earthquake shaking collapsed houses of the Cowichan people on Vancouver Island and caused numerous landslides.
How many earthquakes have there been in the Cascadia subduction zone?
Further research has shown that there have been seven major earthquakes in the Cascadia subduction zone in the last 3,500 years with the time between major quakes ranging from 200 to 900 years. More than 300 years have passed since the quake of 1700, and the region has grown into an economic center home to more than 10 million people.