Podcast
Questions and Answers
What was the magnitude of the 1887 Sonoran earthquake?
What was the magnitude of the 1887 Sonoran earthquake?
Which area is mentioned as one of the most dangerous in terms of earthquake risk?
Which area is mentioned as one of the most dangerous in terms of earthquake risk?
What caused the formation of fault scarps after the 1887 Sonoran earthquake?
What caused the formation of fault scarps after the 1887 Sonoran earthquake?
Which province did the 1887 Sonoran earthquake occur in?
Which province did the 1887 Sonoran earthquake occur in?
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What is the likelihood of another 1887-scale earthquake occurring on the fault discussed in the video?
What is the likelihood of another 1887-scale earthquake occurring on the fault discussed in the video?
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What is the role of Phil Pearthree in the Arizona Geological Survey?
What is the role of Phil Pearthree in the Arizona Geological Survey?
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What was the impact of the 1887 Sonoran earthquake on Sonora, Mexico?
What was the impact of the 1887 Sonoran earthquake on Sonora, Mexico?
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Study Notes
- Research geologist Phil Pr3, chief of environmental geology section at Arizona Geological Survey
- Discussed the 1887 Sonoran earthquake, largest in Arizona history
- Ruptured about 60 miles of Earth's crust near Arizona-Mexico border
- Caused damage in Arizona, Mexico, including church collapses in Sonora with fatalities
- Estimated magnitude 7.4-7.5
- Occurred in Basin and Range province, where valleys formed by faulting
- Valley dropped up to 15 feet after earthquake, forming fault scarp
- Likelihood of another 1887-scale earthquake on that fault infinitesimally low
- Many other active faults in Arizona and surrounding areas pose potential earthquake risk
- Most dangerous areas: northwestern Arizona (Western Grand Canyon), Flagstaff
- Yuma also at risk due to proximity to San Andreas System
- Central and southwestern Arizona have lower seismic hazard, fewer identified faults.
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Description
Explore the details of the 1887 Sonoran earthquake, the largest in Arizona's history, and its impact on the region. Learn about the geological aspects of the earthquake, the formation of fault scarps, and the potential earthquake risks in Arizona and surrounding areas.
