(1) What are the three types of EQs in the Pacific Northwest?
Deep Benioff zone, Crustal, and Subduction Zone
(2) What was the largest magnitude EQ in recorded history, and where did it happen?
It was the 1960 EQ that happened in Chile. It was a 9.5 magnitude.
(3) What was the costliest EQ in recorded history, and where did it happen (according to
this film)?
The costliest EQ took place in 1995 in Kobe, Japan, and it caused 200 billion dollars in damage. (4) How long did shaking last during the 1964 Alaska EQ?
It lasted up to 5 mins
(5) What is the Cascadia Subduction Zone? The Cascade Subduction Zone is a huge offshore fault that is over 700 miles long.
(6) What was the first
evidence for the approximate date
of the last Cascadia Subduction Zone megaquake?
The first hint of the date of the quake was determined through the time of death of the Copalis River forest.
(7) What was the surprising source of the final precise date
of this quake? The precise date was found through examining the possible causes of the Japanese tsunami of 1700. It must have occurred at around 9 p.m. on Jan. 26, 1700.
(8) What two hypotheses are presented about how earthquakes occur in the Pacific Northwest and how large these EQs are? The first hypothesis presented is the idea that the subduction zone has many smaller quakes spread out over several years, or the Decade of Terror Scenario. The other one outlines the idea that the whole subduction zone ruptures in one huge quake, and it was
dubbed the Instant of Terror Hypothesis. (9) Which hypothesis was supported by Brian Atwater, and which by Chris Goldfinger?
Brian Atwater supported the Instant of Terror Hypothesis. Chris Goldfinger was first critical of the Instant of Terror Hypothesis, but his study of turbidites led him to change his mind. (10) Which hypothesis is more strongly supported by the evidence?
