Los Angeles County was placed under an updated tsunami advisory by the National Weather Service on Tuesday at 11:20 p.m. The advisory is in effect until Wednesday July 30, at 12:50 a.m.
“If you are located in this coastal area, move off the beach and out of harbors and marinas. Tsunami advisories mean that a tsunami capable of producing strong currents or waves dangerous to persons in or very near the water is expected or is already occurring. Areas in the advisory should not expect widespread inundation. Tsunamis are a series of waves dangerous many hours after initial arrival time. The first wave may not be the largest. At 4:25 p.m. Pacific Daylight Time on July 29 an earthquake with preliminary magnitude 8.8 occurred 80 miles southeast of Petropavlovsk Kamchatka. Estimated tsunami start times for selected sites are; Fort Bragg California 11:50 p.m. PDT. July 29. Monterey California 12:15 a.m. PDT. July 30. Port San Luis California 12:35 a.m. PDT. July 30. San Francisco California 12:40 a.m. PDT. July 30. Santa Barbara California 12:45 a.m. PDT. July 30. Los Angeles Harbor California 1 a.m. PDT. July 30. Newport Beach California 1:10 a.m. PDT. July 30. La Jolla California 1:10 a.m. PDT. July 30. Oceanside California 1:15 a.m. PDT. July 30,” according to the NWS National Tsunami Warning Center.
The full list of affected locations includes:
Malibu Los Angeles County Beaches Palos Verdes Peninsula Catalina/Santa Barbara Islands San Pablo Bay, Suisun Bay, the West Delta and the San Francisco Bay north of the Bay Bridge San Francisco Bay South of the Bay Bridge San Diego County Coastal Areas Ventura County Beaches Orange County Coast San Miguel/Santa Rosa Islands Santa Cruz/Anacapa Islands Santa Barbara County Southwestern Coast Santa Barbara County Southeastern Coast San Luis Obispo County Beaches San Luis Obispo County Inland Central Coast Santa Lucia Mountains Santa Barbara County Central Coast Beaches Northern Monterey Bay Southern Monterey Bay/Big Sur Coast Coastal North Bay Including Point Reyes National Seashore North Bay Interior Valleys San Francisco Bay Shoreline San Francisco Peninsula Coast Mendocino Coast Southwestern Humboldt San Francisco CountyUnderstanding tsunami alerts
When it comes to tsunami alerts, knowledge is your best defense. The NWS categorizes tsunami alerts into four levels, each signifying a different degree of risk:
Tsunami warning: Immediate action required
This alert is issued when a tsunami that could result in widespread flooding is either expected or already underway. It comes with the potential for dangerous coastal flooding and powerful currents that may persist for hours or even days after the initial wave. Local officials will provide instructions, and evacuation is often recommended, directing individuals to move to higher ground or inland, away from the shoreline.
Tsunami advisory: Exercise caution
When a tsunami with the potential for strong currents or hazardous waves close to the water’s edge is expected or occurring, a tsunami advisory is issued. This may lead to flooding of beach and harbor areas. It’s crucial to stay out of the water and keep a safe distance from beaches and waterways while following local authorities’ instructions.
Tsunami watch: Be prepared
A tsunami watch is initiated when a distant earthquake occurs, raising the possibility of a tsunami. People in affected areas should stay tuned for updates and be prepared to take action if necessary, even though the threat isn’t immediate.
Tsunami information statement: No immediate threat
This statement is issued when an earthquake has occurred, but there is no threat of a destructive tsunami. In some cases, the earthquake may have been too distant to pose any danger.
There may not always be enough time for an official warning for tsunamis, so it is important that you understand natural warnings. If you are at the coast and feel a strong or long earthquake, see a sudden rise or fall of the ocean, or hear a loud roar from the ocean, a tsunami may follow. This is your warning. Take action and move to a safe place. Do not wait for official instructions.
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