At 10:15 AM PDT, California Weather Forecast Offices will conduct a test of the tsunami warning communication system for coastal areas in central and southern California. Residents in this region may see and hear television and radio announcement of the test. Audio will indicate it is a test, but what viewers may see on television may not indicate it is a test.
In association with Alaska Tsunami Preparedness Week, a tsunami warning communications test will also
occur at 10:15AM AKDT. This test will be conducted for portions of coastal communities in Southeast Alaska, the Kenai Peninsula, Kodiak, the Aleutians and Pribilofs. Audio on TV and radio will indicate it is a "test", but what viewers see on their television screens may not. Go to https://ready.alaska.gov to provide feedback regarding your test reception.
These tests will be cancelled in the event of any significant seismic activity.