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July 29, 2021 Alaska Tsunami
NOAA DART® and NOAA/NOS/CO-OPS Data

On 2021/07/29, southeast of Perryville, Alaska (south of the Alaska Peninsula), a magnitude 8.2 earthquake occurred.

This page provides data from the Deep-ocean Assessment and Reporting of Tsunami (DART®) buoys and processed NOAA/NOS/CO-OPS coastal tide-gauge stations. Files contain raw observations, fitted tidal components, and residual tide values. The DART® data are the real-time water level data (in meters) as recorded by the Bottom Pressure Recorder (BPR) in extended-reporting mode containing measurement types of 15 minutes, 1 minute, and 15 seconds. Real-time data were extracted from the National Data Buoy Center.

For DART 4G 46403 and 46410 data, records may be provided upon request.

On the right of the Tsunami Travel Time map below there are links to individual data files under column Data. The columns in those files are as follows: Time is in Julian days from the beginning of the year, Year, Month, Day, Hours, Minutes, Seconds, Raw Observations, Fitted tidal component, and computed residuals in meters water column.
Details on the data processing methods.
Tsunami Travel Time Map
Station number Station name and location Latitude [deg] Longitude [deg] Data [m] Plot
DART® stations
21414 170 NM South of Amchitka, AK 48.9672 N 178.2275 E * *
21415 175 NM South of Attu, AK 50.1530 N 171.8970 E * *
21416 240 NM SE of Kamchatka Peninsula, RU 38.7667 N 148.6525 E * *
21418 450 NM NE of Tokyo, JP 38.7667 N 148.6525 E * *
21419 209 NM SE of Kuril Is 44.4011 N 155.6534 E * *
46402 220 NM SSE of Dutch Harbor, AK 50.9783 N 163.9483 W * *
46404 230 NM West of Astoria, OR 45.8483 N 128.7750 W * *
46407 210 NM West of Coos Bay, OR 42.7083 N 127.8250 W * *
46408 212 NM South of Umnak Is, AK 49.6519 N 169.8944 W * *
46409 210 NM SE of Kodiak, AK 55.3092 N 148.5407 W * *
46413 243 NM SSE of Adak Is, AK 48.0383 N 173.9169 W * *
46414 165 NM SE of Chirikof Is, AK 53.7255 N 152.4833 W * *
46416 442 NM West of Vancouver, BC, Canada 49.9007 N 134.4055 W * *
46419 300 NM WNW of Seattle, WA 48.8037 N 129.6196 W * *
51407 34 NM West of Kailua-Kona, HI 19.5583 N 156.5358 W * *
52401 610 NM ENE of Saipan 19.2395 N 155.7293 E * *
Alaska and Aleutian Islands tide gauges
9451600 Sitka, AK 57.0517 -135.3417 * *
9452210 Juneau, AK 58.2989 -134.4106 * *
9452400 Skagway, AK 59.4508 -135.3280 * *
9452634 Elfin Cove, AK 58.1947 -136.3469 * *
9453220 Yakutat Bay, AK 59.5485 -139.7334 * *
9454050 Cordova, AK 60.5574 -145.7553 * *
9455090 Seaward, AK 60.1200 -149.4267 * *
9455500 Seldovia, AK 59.4405 -151.7199 * *
9457292 Kodiak Is, AK 57.7303 -152.5139 * *
9457526 Old Harbor, AK (NTWC) 57.199811 -153.307086 * *
9459450 Sand Point, AK 55.3317 -160.5043 * *
9459881 King Cove, AK 55.0599 -162.3261 * *
9461380 Adak Island, AK 51.8633 -176.6320 * *
9461710 Atka, AK 52.2320 -174.1726 * *
9462450 Nikolski, AK 52.9406 -168.8713 * *
9462620 Unalaska, AK 53.8792 -166.5403 * *
US Pacific Islands tide gauges
1612480 Mokuoloe, Hi 21.4331 -157.7900 * *
1615680 Kahului Harbor, Hi 21.4331 -156.4767 * *
1617760 Hilo Bay, Hi 19.7303 -155.05580 * *
US West Coast tide gauges
9410170 San Diego, CA 32.7142 -117.17360 * *
9410660 Los Angeles, CA 33.7199 -118.27290 * *
9412110 Port San Luis, CA 35.1688 -120.75420 * *
9413450 Monterey, CA 36.6051 -121.88930 * *
9414290 San Francisco, CA 37.8063 -122.46590 * *
9414750 Alameda, CA 37.7717 -122.30000 * *
9414863 Richmond, CA 37.9230 -122.40960 * *
9416841 Arena Cove, CA 38.9146 -123.71110 * *
9418767 Eureka, CA 40.7664 -124.21720 * *
9419750 Crescent City, CA 41.7456 -124.18440 * *
9431647 Port Orford, OR 42.7390 -124.49830 * *
9432780 Charleston, OR 43.3333 -124.31670 * *
9435380 Newport, OR 44.6254 -124.04490 * *
9437540 Garibaldi, OR 45.5545 -123.9189 * *
9440581 Cape Disappointment, WA 46.2811 -124.04610 * *
9440910 Toke Point, WA 46.7075 -123.96650 * *
9441102 Westport, WA 46.9043 -124.10510 * *
9442396 La Push, WA 47.9133 -124.63700 * *
9443090 Neah Bay, WA 48.3703 -124.60190 * *
9444090 Port Angeles, WA 48.1247 -123.44110 * *
9444900 Port Townsend, WA 48.0963 -122.75950 * *