WEAK51 PAAQ 290900 TSUAK1 BULLETIN Public Tsunami Message Number 6 NWS National Tsunami Warning Center Palmer AK 100 AM AKDT Thu Jul 29 2021 UPDATES ------- * Updated observations ...THE TSUNAMI ADVISORY REMAINS IN EFFECT... Tsunami Advisory in Effect for; * SOUTH ALASKA AND THE ALASKA PENINSULA, Pacific coasts from Hinchinbrook Entrance, Alaska (90 miles E of Seward) to Unimak Pass, Alaska (80 miles NE of Unalaska) * ALEUTIAN ISLANDS, Unimak Pass, Alaska (80 miles NE of Unalaska) to Samalga Pass, Alaska (30 miles SW of Nikolski) For other US and Canadian Pacific coasts in North America, the level of tsunami danger is being evaluated. Further information will be provided in supplementary messages. FORECASTS OF TSUNAMI ACTIVITY ----------------------------- * A tsunami has been generated. The first waves are forecasted to arrive at the following locations and specified times. * Forecast tsunami duration is the approximate length of time which the tsunami may produce dangerous currents and waves. * Forecast max tsunami height is the highest expected water level above the tide. * Forecasts are not provided for sites which have been impacted more than an hour prior to the time of this message. FORECAST FORECAST FORECAST START TSUNAMI MAX TSUNAMI SITE OF TSUNAMI DURATION HEIGHT ---- ---------- -------- ------------- * Alaska Seward 0020 AKDT Jul 29 less than 1ft Homer 0115 AKDT Jul 29 less than 1ft OBSERVATIONS OF TSUNAMI ACTIVITY - UPDATED ------------------------------------------ * Observed max tsunami height is the highest recorded water level above the tide level up to the time of this message. TIME OBSERVED MAX SITE OF MEASUREMENT TSUNAMI HEIGHT ---------------------------- ---------------- -------------- Sand Point Alaska 0042 PDT Jul 29 0.5ft King Cove Alaska 0109 PDT Jul 29 0.4ft Kodiak Alaska 0127 PDT Jul 29 0.5ft Old Harbor Alaska 0057 PDT Jul 29 0.7ft PRELIMINARY EARTHQUAKE PARAMETERS --------------------------------- * Magnitude 8.2 * Origin Time 2216 AKDT Jul 28 2021 2316 PDT Jul 28 2021 0616 UTC Jul 29 2021 * Coordinates 55.3 North 157.8 West * Depth 20 miles * Location 75 miles SE of Chignik, Alaska 500 miles SW of Anchorage, Alaska RECOMMENDED ACTIONS ------------------- * See message number 5 for recommended actions. IMPACTS ------- * See message number 5 for possible impacts. ADDITIONAL INFORMATION AND NEXT UPDATE -------------------------------------- * Refer to the internet site tsunami.gov for more information. * Pacific coastal residents outside California, Oregon, Washington, British Columbia and Alaska should refer to the Pacific Tsunami Warning Center messages at tsunami.gov. * This message will be updated within 30 minutes. $$