Curry County Emergency Management

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Presentation transcript:

Curry County Emergency Management Tsunami Sirens

Hint: The above image is NOT a real tsunami. What is a Tsunami? Hint: The above image is NOT a real tsunami.

Local Tsunami Generated by very large earthquake in our subduction zone Displaced ocean water pushes inland in a series of tidal surges 40 Magnitude 8–9.0+ earthquakes along Cascadia over past 10,000 years Last local tsunami: January 26th, 1700

IF THE GROUND SHAKES… Evacuate Evacuate Evacuate The ground shaking IS your warning! Government warning systems may fail during a Cascadia Earthquake! IF THE GROUND SHAKES… Evacuate Evacuate Evacuate

Distant Tsunami Generated by large subduction earthquake in a distant location Distant tsunamis generated in Chile, Japan, Kamchatka, Alaska Since 1933, 31 distant tsunamis have been observed along and near Curry County

Public Warning Systems

Tsunami Sirens 17 Tsunami sirens in Curry County 2 have been repaired in past 18 months (Port Orford, Harris Beach) 4 currently operational

“A number of years ago there were +/- 32 sirens along coastal Tillamook. After the new charts came out, and our findings and experience with the Japan incident, a committee submitted their findings and the siren owners in the county chose to no longer support this very old technology as the cost/benefit ratio just didn't justify their continued upkeep and/or replacement, opting for the newer ways of notifications. There are a few remaining sirens that are used by Fire Departments to activate their volunteers, and a summer camp to call in their folks, otherwise, they have all been removed.” “Lincoln County has zero under our jurisdiction. We do not support distant tsunami sirens as technology will work and there is ample time to do door to door notifications and assist the public to evacuate. Distant tsunami zone is very small and risk to public is low for life safety.”

Cost to replace siren head at Boice Cope: $22,000

Recommendation: Discontinue County use of tsunami sirens. Cost to repair / replace sirens excessive versus benefit and capability Oregon Counties have discontinued use Multiple warning systems currently in place Minimum lead time of 4 hours for distant tsunami Recommendation: Discontinue County use of tsunami sirens.