Station AV LSPA - Pratt Point, Little Sitkin Volcano, Alaska
Network: AV - Alaska Volcano Observatory
Nearby stations (2 deg radius)
| Station | Name | (Lat, Lon) | Start / End | Elevation |
| LSPA | Pratt Point, Little Sitkin Volcano, Alaska | (51.96, 178.57) | 2005-09-30 / 2499-01-01 | 335 m |
| Crust2 Type: | S1,continental slope, margin, transition 1 km seds. |
| Thickness Estimate: | 24 km |
| Thickness StdDev: | 16 km |
| Vp/Vs Estimate: | 2.06 |
| Vp/Vs StdDev: | 0.16 |
| Vs Estimate: | 3.001 km/s |
| Poisson's Ratio: | 0.35 |
| Peak Value: | 0.02 |
| Assumed Vp: | 6.183 km/s |
| Ps Weight: | 0.33333334 |
| PpPs Weight: | 0.33333334 |
| PsPs Weight: | 0.33333328 |
| Residual Complexity: | 0.750 |
| Nearby stations H: | +- |
| (2.0 deg) Vp/Vs: | +- |
2 with match > 90% ( 1.980198 %) and 11 with match > 80% ( 10.891089 %) out of 101.
Download stack as xyz text file.
Azimuth Distribution of Events:
Prior Results for this Station
| Study | Thickness | Vp/Vs | Vp | Vs | Poissons Ratio | Extra |
| EARS | 24 km | 2.06 | 6.183 km/s | 3.001 km/s | 0.35 | |
| Crust2.0 | 23 km | 1.81 | 6.183 km/s | 3.422 km/s | 0.28 | S1,continental slope, margin, transition 1 km seds. |
| Global Maxima | 24 km | 2.06 | 6.183 km/s | 3.001 km/s | 0.35 | amp=0.016309299 |
| Local Maxima 1 | 34 km | 1.78 | 6.183 km/s | 3.473 km/s | 0.27 | amp=0.011450209 |
| Local Maxima 2 | 66 km | 1.74 | 6.183 km/s | 3.558 km/s | 0.25 | amp=0.0062545133 |
| Local Maxima 3 | 60 km | 1.95 | 6.183 km/s | 3.167 km/s | 0.32 | amp=0.0061633675 |
| Local Maxima 4 | 44 km | 1.96 | 6.183 km/s | 3.158 km/s | 0.32 | amp=0.005916219 |
| Predicted Arrivals for vertical incidence (zero ray parameter) | |
| Ps | 4.16 SECOND |
| PpPs | 12.00 SECOND |
| PsPs/PpSs | 16.16 SECOND |
Events Processed for this Station
Download zip of receiver functions as SAC
Plot maxima for each earthquake.
Events Used in the Stack
(11 events)| Radial Match | Distance | Baz | FERegion | Time | Lat/Lon | Depth | Magnitude |
| 92.22295 | 75.1 deg | 187.537 deg | Southeast Of Loyalty Islands | 2023/05/19 02:57:07 UTC | (-23.2, 170.7) | 10 km | 7.7 Mi |
| 90.0466 | 64.1 deg | 215.961 deg | Eastern New Guinea Reg., P.N.G. | 2022/09/10 23:46:55 UTC | (-6.2, 146.5) | 61 km | 7.6 mww |
| 89.92581 | 68.5 deg | 87.707 deg | Near Coast Of Michoacan, Mexico | 2022/09/19 18:05:09 UTC | (18.2, -103.4) | 10 km | 7.5 Mi |
| 89.63437 | 67.3 deg | 192.045 deg | Vanuatu Islands | 2021/08/18 10:10:05 UTC | (-14.9, 167.1) | 91 km | 6.8 mww |
| 84.714386 | 71.4 deg | 170.707 deg | Tonga Islands Region | 2022/11/11 10:48:45 UTC | (-19.3, -172.1) | 25 km | 7.3 Mww |
| 83.13177 | 75.6 deg | 174.084 deg | Tonga Islands Region | 2023/06/16 19:10:52 UTC | (-23.8, -175.2) | 10 km | 6.5 Mi |
| 82.87998 | 71.7 deg | 85.771 deg | Near Coast Of Guerrero, Mexico | 2021/09/08 01:47:46 UTC | (17.0, -99.8) | 13 km | 7.0 mww |
| 80.87854 | 74.7 deg | 175.383 deg | South Of Fiji Islands | 2023/06/15 18:06:29 UTC | (-22.9, -176.6) | 206 km | 7.0 Mi |
| 80.47571 | 74.7 deg | 175.967 deg | South Of Fiji Islands | 2023/06/15 18:06:27 UTC | (-23.0, -177.2) | 167 km | 7.2 Mww |
| 80.22366 | 73.2 deg | 188.255 deg | Southeast Of Loyalty Islands | 2022/09/14 11:04:07 UTC | (-21.2, 170.1) | 124 km | 7.0 Mi |
| 80.10163 | 74.0 deg | 172.994 deg | Tonga Islands Region | 2021/09/05 17:51:42 UTC | (-22.1, -174.2) | 10 km | 5.9 mww |
Losers
(90 events)| Radial Match | Distance | Baz | FERegion | Time | Lat/Lon | Depth | Magnitude | Reason |
| 91.34889 | 59.7 deg | 252.417 deg | Mindoro, Philippines | 2021/07/23 20:48:57 UTC | (13.7, 120.7) | 110 km | 6.7 mww | |
| 88.936966 | 52.1 deg | 259.066 deg | Taiwan | 2022/09/18 06:44:15 UTC | (23.1, 121.3) | 10 km | 7.2 Mi | |
| 88.912155 | 75.1 deg | 187.784 deg | Southeast Of Loyalty Islands | 2023/05/20 01:51:01 UTC | (-23.1, 170.4) | 45 km | 7.4 Mi | |
| 81.349884 | 62.1 deg | 242.124 deg | Mindanao, Philippines | 2021/08/11 17:46:14 UTC | (6.5, 126.8) | 50 km | 7.2 Mi | |
| 79.86809 | 41.4 deg | 228.992 deg | Mariana Islands | 2022/07/08 23:36:11 UTC | (18.8, 146.8) | 23 km | 6.3 Mi | |
| 78.89214 | 75.2 deg | 187.686 deg | Southeast Of Loyalty Islands | 2023/05/19 04:54:04 UTC | (-23.2, 170.5) | 28 km | 5.5 mb | |
| 77.819565 | 67.8 deg | 279.032 deg | Myanmar | 2021/07/29 08:39:27 UTC | (22.9, 96.0) | 10 km | 5.5 mb | |
| 77.54393 | 55.1 deg | 255.833 deg | Philippine Islands Region | 2022/06/30 18:40:38 UTC | (19.1, 121.3) | 36 km | 5.9 Mww | |
| 77.055855 | 59.6 deg | 252.5 deg | Mindoro, Philippines | 2023/06/15 02:19:25 UTC | (13.8, 120.7) | 124 km | 6.2 mww | |
| 76.19188 | 82.0 deg | 175.126 deg | Kermadec Islands Region | 2023/03/16 00:55:58 UTC | (-30.2, -175.9) | 10 km | 7.1 Mi | |
| 76.0551 | 63.6 deg | 220.113 deg | New Guinea, Papua New Guinea | 2023/04/02 18:04:12 UTC | (-4.3, 143.2) | 74 km | 7.3 Mi | |
| 74.93369 | 73.6 deg | 233.433 deg | Banda Sea | 2021/12/29 18:25:51 UTC | (-7.6, 127.6) | 167 km | 7.3 mww | |
| 73.99078 | 87.1 deg | 311.623 deg | Southern Iran | 2022/07/01 23:25:15 UTC | (26.9, 55.3) | 10 km | 6.0 Mwb | |
| 73.47135 | 63.5 deg | 243.061 deg | Mindanao, Philippines | 2021/08/27 10:22:26 UTC | (5.7, 125.2) | 39 km | 5.6 Mww | |
| 72.0227 | 66.5 deg | 241.68 deg | Celebes Sea | 2022/11/06 00:03:13 UTC | (2.5, 124.7) | 239 km | 5.6 mww | |
| 70.524345 | 62.9 deg | 243.855 deg | Mindanao, Philippines | 2022/08/15 08:23:05 UTC | (6.6, 125.0) | 10 km | 5.2 Mww | |
| 70.27257 | 74.8 deg | 186.279 deg | Southeast Of Loyalty Islands | 2022/05/26 15:38:03 UTC | (-22.9, 172.0) | 10 km | 6.9 Mi | |
| 69.68061 | 51.6 deg | 259.381 deg | Taiwan | 2022/06/20 01:05:07 UTC | (23.7, 121.5) | 8.0 km | 5.9 mww | |
| 69.64733 | 67.5 deg | 172.886 deg | Tonga Islands | 2023/05/10 16:02:00 UTC | (-15.6, -174.6) | 210 km | 7.6 mww | |
| 69.19089 | 81.6 deg | 176.568 deg | Kermadec Islands, New Zealand | 2021/08/31 02:52:49 UTC | (-30.0, -177.5) | 10 km | 6.3 mww | |
| 68.81889 | 84.3 deg | 177.908 deg | South Of Kermadec Islands | 2022/08/14 13:44:17 UTC | (-32.7, -179.0) | 10 km | 6.4 Mww | |
| 68.571495 | 87.1 deg | 311.696 deg | Southern Iran | 2022/07/01 21:32:07 UTC | (26.9, 55.2) | 10 km | 6.1 mww | |
| 68.131996 | 63.7 deg | 200.963 deg | Solomon Islands | 2022/11/22 02:03:07 UTC | (-9.8, 159.6) | 14 km | 7.0 Mww | |
| 67.55271 | 75.0 deg | 187.939 deg | Southeast Of Loyalty Islands | 2023/05/23 06:42:00 UTC | (-23.0, 170.2) | 18 km | 5.9 mww | |
| 67.54247 | 59.6 deg | 252.48 deg | Mindoro, Philippines | 2021/07/23 20:57:18 UTC | (13.8, 120.7) | 122 km | 5.8 Mww | |
| 67.39887 | 84.7 deg | 261.385 deg | Southern Sumatra, Indonesia | 2022/09/10 23:10:44 UTC | (-1.1, 98.6) | 20 km | 6.0 Mww | |
| 67.36782 | 84.5 deg | 177.103 deg | South Of Kermadec Islands | 2022/08/14 13:44:22 UTC | (-32.9, -178.0) | 33 km | 6.8 Mi | |
| 67.05105 | 32.2 deg | 259.85 deg | Near West Coast Of Honshu, Japan | 2023/05/05 05:42:04 UTC | (37.5, 137.3) | 8.7 km | 6.2 mww | |
| 66.41492 | 87.1 deg | 311.695 deg | Southern Iran | 2022/07/01 23:24:14 UTC | (26.9, 55.2) | 10 km | 6.1 mb | |
| 66.2731 | 59.6 deg | 252.338 deg | Mindoro, Philippines | 2021/08/13 15:08:32 UTC | (13.7, 120.8) | 129 km | 5.8 mww | |
| 66.02029 | 67.8 deg | 170.71 deg | Samoa Islands Region | 2022/12/04 19:24:27 UTC | (-15.7, -172.5) | 148 km | 6.9 Mi | |
| 65.727806 | 68.7 deg | 87.181 deg | Michoacan, Mexico | 2022/09/22 06:16:11 UTC | (18.4, -102.9) | 61 km | 6.8 mww | |
| 65.194534 | 66.2 deg | 239.692 deg | Northern Molucca Sea | 2022/08/14 02:47:46 UTC | (1.8, 126.4) | 30 km | 5.7 mww | |
| 65.06511 | 85.1 deg | 255.427 deg | Southern Sumatra, Indonesia | 2022/08/23 14:31:40 UTC | (-5.1, 103.1) | 59 km | 6.0 Mww | |
| 64.6415 | 72.9 deg | 183.948 deg | Vanuatu Islands Region | 2021/10/09 10:58:30 UTC | (-21.2, 174.5) | 520 km | 6.9 mww | |
| 64.555305 | 75.1 deg | 304.807 deg | Southeastern Afghanistan | 2022/06/21 20:54:36 UTC | (33.1, 69.5) | 10 km | 5.9 mwb | |
| 64.387886 | 85.9 deg | 256.182 deg | Southern Sumatra, Indonesia | 2022/05/16 18:58:23 UTC | (-5.3, 102.0) | 15 km | 5.8 Mww | |
| 64.02382 | 85.3 deg | 252.602 deg | Sunda Strait, Indonesia | 2022/01/14 09:05:42 UTC | (-6.9, 105.3) | 37 km | 6.6 mww | |
| 63.943356 | 70.0 deg | 307.877 deg | Afghanistan-Tajikistan Bord Reg. | 2021/07/10 02:14:43 UTC | (39.0, 70.6) | 17 km | 5.8 Mww | |
| 63.83751 | 63.3 deg | 245.117 deg | Mindanao, Philippines | 2022/08/13 06:25:31 UTC | (6.9, 123.8) | 16 km | 5.8 mww | |
| 63.826977 | 81.8 deg | 79.669 deg | Off Coast Of Central America | 2022/12/15 14:32:23 UTC | (12.9, -88.5) | 74 km | 5.7 Mww | |
| 63.525284 | 73.5 deg | 177.997 deg | Fiji Islands Region | 2021/07/02 20:14:38 UTC | (-21.8, -179.4) | 606 km | 6.1 Mww | |
| 63.296165 | 62.8 deg | 243.792 deg | Mindanao, Philippines | 2022/10/19 08:05:40 UTC | (6.7, 125.1) | 26 km | 5.4 Mww | |
| 62.457596 | 72.1 deg | 177.045 deg | Fiji Islands Region | 2022/03/07 05:34:18 UTC | (-20.4, -178.4) | 582 km | 6.1 mww | |
| 62.316402 | 56.5 deg | 255.543 deg | Luzon, Philippines | 2022/10/25 14:59:04 UTC | (17.9, 120.6) | 10 km | 6.8 Mi | |
| 62.013607 | 97.2 deg | 304.37 deg | Owen Fracture Zone Region | 2023/04/03 21:34:46 UTC | (14.5, 56.3) | 10 km | 5.5 Mww | |
| 61.310925 | 77.7 deg | 239.192 deg | Flores Region, Indonesia | 2022/02/21 12:35:57 UTC | (-8.2, 120.6) | 10 km | 5.8 Mww | |
| 61.09819 | 84.3 deg | 79.242 deg | Near Coast Of Nicaragua | 2021/11/09 06:25:17 UTC | (11.2, -86.5) | 35 km | 6.2 mww | |
| 60.905308 | 84.6 deg | 261.442 deg | Southern Sumatra, Indonesia | 2022/08/29 03:29:13 UTC | (-1.0, 98.6) | 18 km | 5.9 mww | |
| 60.780827 | 74.0 deg | 187.375 deg | Southeast Of Loyalty Islands | 2022/08/14 21:04:46 UTC | (-22.1, 170.9) | 83 km | 6.2 mww | |
| 60.707172 | 69.0 deg | 241.191 deg | Minahassa Peninsula, Sulawesi | 2022/06/07 13:24:13 UTC | (0.1, 123.7) | 132 km | 5.6 mww | |
| 60.478897 | 79.4 deg | 175.373 deg | Kermadec Islands Region | 2021/06/06 23:16:39 UTC | (-27.7, -176.3) | 10 km | 5.8 mww | |
| 60.376045 | 84.5 deg | 261.666 deg | Southern Sumatra, Indonesia | 2023/04/24 20:00:55 UTC | (-0.8, 98.5) | 15 km | 7.1 Mww | |
| 59.766937 | 77.6 deg | 180.193 deg | South Of Fiji Islands | 2022/11/09 09:38:42 UTC | (-26.0, 178.4) | 629 km | 6.8 mww | |
| 58.898563 | 84.9 deg | 318.498 deg | Western Iran | 2021/10/04 02:39:27 UTC | (32.3, 49.8) | 10 km | 5.6 mww | |
| 58.696545 | 65.1 deg | 216.088 deg | Near S Coast Of New Guinea, P.N.G. | 2022/02/01 14:05:02 UTC | (-7.1, 146.0) | 178 km | 5.4 Mww | |
| 58.532204 | 65.8 deg | 238.912 deg | Halmahera, Indonesia | 2022/05/08 21:51:41 UTC | (1.8, 127.2) | 56 km | 5.5 mww | |
| 58.454617 | 35.3 deg | 252.511 deg | Southeast Of Honshu, Japan | 2021/09/13 22:46:06 UTC | (32.4, 137.9) | 376 km | 5.9 Mww | |
| 58.359413 | 81.9 deg | 176.838 deg | Kermadec Islands, New Zealand | 2021/06/20 17:05:48 UTC | (-30.2, -177.8) | 10 km | 6.5 mww | |
| 58.04728 | 71.8 deg | 176.967 deg | Fiji Islands Region | 2022/11/12 07:09:14 UTC | (-20.1, -178.4) | 587 km | 7.0 mww | |
| 58.022266 | 63.3 deg | 239.361 deg | North Of Halmahera, Indonesia | 2021/12/04 23:47:57 UTC | (4.1, 128.1) | 174 km | 6.0 mww | |
| 57.543854 | 82.8 deg | 79.693 deg | Near Coast Of Nicaragua | 2021/09/22 09:57:07 UTC | (12.1, -87.8) | 10 km | 6.7 Mi | |
| 57.25494 | 51.7 deg | 259.097 deg | Taiwan | 2022/03/22 17:41:38 UTC | (23.4, 121.6) | 24 km | 6.7 mww | |
| 57.201378 | 81.1 deg | 177.669 deg | Kermadec Islands, New Zealand | 2023/03/04 06:41:22 UTC | (-29.5, -178.8) | 206 km | 6.9 mww | |
| 55.30174 | 65.8 deg | 191.915 deg | Vanuatu Islands | 2021/09/17 10:28:40 UTC | (-13.4, 167.4) | 10 km | 5.8 mww | |
| 54.942593 | 67.3 deg | 171.128 deg | Samoa Islands Region | 2022/07/12 00:35:05 UTC | (-15.3, -172.9) | 10 km | 5.5 mb | |
| 54.913666 | 85.1 deg | 329.962 deg | Turkey | 2023/02/06 01:28:13 UTC | (37.1, 37.2) | 12 km | 6.7 Mww | |
| 54.7311 | 68.2 deg | 191.942 deg | Vanuatu Islands | 2022/08/14 03:11:50 UTC | (-15.8, 167.1) | 10 km | 5.9 Mww | |
| 53.88613 | 75.0 deg | 175.74 deg | South Of Fiji Islands | 2021/08/17 17:24:47 UTC | (-23.2, -177.0) | 139 km | 5.8 Mww | |
| 52.607384 | 68.7 deg | 192.086 deg | Vanuatu Islands | 2022/04/09 20:52:37 UTC | (-16.3, 166.8) | 10 km | 6.2 mww | |
| 52.175606 | 64.2 deg | 223.598 deg | Irian Jaya, Indonesia | 2021/08/28 12:27:23 UTC | (-3.5, 140.1) | 10 km | 5.5 mww | |
| 51.09987 | 79.4 deg | 80.716 deg | Guatemala | 2022/11/12 04:39:47 UTC | (14.1, -90.8) | 100 km | 5.8 mww | |
| 50.930332 | 72.1 deg | 189.272 deg | Vanuatu Islands | 2022/07/22 11:31:47 UTC | (-20.0, 169.2) | 82 km | 5.5 Mww | |
| 50.705006 | 70.7 deg | 242.221 deg | Minahassa Peninsula, Sulawesi | 2021/07/26 12:09:06 UTC | (-0.7, 121.9) | 11 km | 6.2 mww | |
| 50.2717 | 64.7 deg | 192.47 deg | Santa Cruz Islands | 2022/05/28 14:11:12 UTC | (-12.2, 167.1) | 214 km | 5.6 Mww | |
| 49.36542 | 69.1 deg | 233.774 deg | Seram, Indonesia | 2021/06/16 04:43:07 UTC | (-3.6, 129.5) | 5.7 km | 5.9 Mww | |
| 49.2825 | 63.2 deg | 215.896 deg | Eastern New Guinea Reg., P.N.G. | 2023/03/14 00:49:08 UTC | (-5.4, 146.9) | 213 km | 6.3 mww | |
| 48.58141 | 74.3 deg | 173.391 deg | Tonga Islands Region | 2021/08/14 09:50:13 UTC | (-22.4, -174.6) | 10 km | 5.5 mww | |
| 48.55055 | 69.1 deg | 241.11 deg | Minahassa Peninsula, Sulawesi | 2021/07/09 13:31:09 UTC | (0.1, 123.7) | 118 km | 5.6 mww | |
| 47.77162 | 75.2 deg | 178.347 deg | South Of Fiji Islands | 2022/07/27 16:16:47 UTC | (-23.5, -179.7) | 545 km | 5.7 Mww | |
| 47.4947 | 69.5 deg | 167.063 deg | Samoa Islands Region | 2022/09/14 05:08:06 UTC | (-16.9, -168.8) | 10 km | 6.0 Mi | |
| 47.45259 | 74.7 deg | 187.937 deg | Southeast Of Loyalty Islands | 2022/03/30 20:56:58 UTC | (-22.7, 170.3) | 10 km | 6.7 mww | |
| 46.869488 | 76.7 deg | 180.103 deg | South Of Fiji Islands | 2023/04/28 03:13:43 UTC | (-25.1, 178.5) | 577 km | 6.2 mb | |
| 46.34121 | 81.7 deg | 176.759 deg | Kermadec Islands, New Zealand | 2022/03/02 12:52:07 UTC | (-30.1, -177.7) | 24 km | 6.6 mww | |
| 45.873383 | 69.8 deg | 177.903 deg | Fiji Islands Region | 2021/12/26 15:42:56 UTC | (-18.1, -179.4) | 627 km | 6.1 mww | |
| 42.89746 | 72.4 deg | 243.189 deg | Sulawesi, Indonesia | 2023/02/27 01:26:03 UTC | (-1.7, 120.2) | 23 km | 5.6 Mww | |
| 42.757885 | 72.6 deg | 183.573 deg | Vanuatu Islands Region | 2021/10/02 06:29:16 UTC | (-20.9, 174.9) | 486 km | 7.2 Mi | |
| 38.979115 | 83.3 deg | 176.336 deg | Kermadec Islands Region | 2021/06/16 01:44:30 UTC | (-31.6, -177.2) | 8.8 km | 5.3 Mww | |
| 38.881626 | 50.3 deg | 230.213 deg | W. Caroline Islands, Micronesia | 2023/03/08 13:43:22 UTC | (11.4, 141.5) | 10 km | 5.4 Mww | |
| 38.757526 | 62.8 deg | 213.87 deg | New Britain Region, P.N.G. | 2022/09/02 22:39:51 UTC | (-5.7, 148.7) | 126 km | 6.1 Mww |
