LOS ANGELES (AP) — California will conduct a test of tsunami warning communications on Wednesday.

Gov. Jerry Brown notes in a proclamation that Sunday is the 52nd anniversary of the 1964 Alaska earthquake and tsunami that caused millions of dollars in damage to the California coast and killed 12 people at Crescent City.

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The National Weather Service and California Office of Emergency Services will transmit tsunami warning codes in Del Norte, Humboldt and Mendocino counties between 11 a.m. and noon via NOAA All-Hazards Radio, the Emergency Alert System, TV and radio stations.

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To the south the system will be checked as a “required monthly test” message via NOAA radio and TV and radio stations.

Los Angeles County authorities note the test will be canceled if there is excessive seismic activity beforehand.

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