Station N4 R61A - Willards, MD, USA
Network: N4 - Central and EAstern US Network
Nearby stations (2 deg radius)
| Station | Name | (Lat, Lon) | Start / End | Elevation |
| R61A | Willards, MD, USA | (38.33, -75.34) | 2015-02-09 / 2599-12-31 | 76 m |
| Crust2 Type: | T7,Margin /shield transition, 3.5 km seds. |
| Thickness Estimate: | 26 km |
| Thickness StdDev: | 13 km |
| Vp/Vs Estimate: | 1.60 |
| Vp/Vs StdDev: | 0.09 |
| Vs Estimate: | 3.93 km/s |
| Poisson's Ratio: | 0.18 |
| Peak Value: | 0.03 |
| Assumed Vp: | 6.287 km/s |
| Ps Weight: | 0.33333334 |
| PpPs Weight: | 0.33333334 |
| PsPs Weight: | 0.33333328 |
| Residual Complexity: | 0.898 |
| Nearby stations H: | +- |
| (2.0 deg) Vp/Vs: | +- |
0 with match > 90% ( 0.0 %) and 8 with match > 80% ( 10.256411 %) out of 78.
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 | 26 km | 1.60 | 6.287 km/s | 3.93 km/s | 0.18 | |
| Crust2.0 | 32 km | 1.79 | 6.287 km/s | 3.506 km/s | 0.27 | T7,Margin /shield transition, 3.5 km seds. |
| Global Maxima | 26 km | 1.60 | 6.287 km/s | 3.93 km/s | 0.18 | amp=0.029869834 |
| Local Maxima 1 | 48 km | 1.89 | 6.287 km/s | 3.318 km/s | 0.31 | amp=0.024228793 |
| Local Maxima 2 | 29 km | 2.07 | 6.287 km/s | 3.041 km/s | 0.35 | amp=0.021777911 |
| Local Maxima 3 | 25 km | 1.60 | 6.287 km/s | 3.93 km/s | 0.18 | amp=0.020141333 |
| Local Maxima 4 | 68 km | 1.60 | 6.287 km/s | 3.93 km/s | 0.18 | amp=0.016376957 |
| Predicted Arrivals for vertical incidence (zero ray parameter) | |
| Ps | 2.48 SECOND |
| PpPs | 10.75 SECOND |
| PsPs/PpSs | 13.23 SECOND |
Events Processed for this Station
Download zip of receiver functions as SAC
Plot maxima for each earthquake.
Events Used in the Stack
(8 events)| Radial Match | Distance | Baz | FERegion | Time | Lat/Lon | Depth | Magnitude |
| 89.86244 | 76.7 deg | 53.394 deg | Dodecanese Islands, Greece | 2017/07/20 22:31:12 GMT | (36.9, 27.5) | 10 km | 6.7 Mww |
| 89.3562 | 63.2 deg | 316.751 deg | Fox Islands, Aleutian Islands | 2015/07/27 04:49:44 GMT | (52.4, -169.7) | 12 km | 6.9 MO |
| 89.3562 | 63.2 deg | 316.751 deg | Fox Islands, Aleutian Islands | 2015/07/27 04:49:44 GMT | (52.4, -169.7) | 12 km | 6.9 MO |
| 86.61683 | 37.9 deg | 187.211 deg | Near Coast Of Ecuador | 2016/05/18 07:57:05 GMT | (0.4, -79.8) | 32 km | 6.7 MWP, 6.7 MWW, 6.7 MI |
| 81.66152 | 64.4 deg | 54.8 deg | Central Italy | 2016/08/24 01:36:33 GMT | (42.7, 13.2) | 10 km | 6.2 MWP |
| 81.198204 | 75.9 deg | 330.078 deg | Near East Coast Of Kamchatka | 2016/11/25 07:26:23 GMT | (54.4, 160.6) | 84 km | 5.5 MB |
| 80.40321 | 79.1 deg | 327.676 deg | East Of Kuril Islands | 2019/03/28 22:06:49 GMT | (50.5, 160.0) | 9.0 km | 6.2 Mww |
| 80.19902 | 43.7 deg | 182.342 deg | Northern Peru | 2016/09/10 10:08:20 GMT | (-5.6, -77.0) | 114 km | 6.0 MB |
Losers
(70 events)| Radial Match | Distance | Baz | FERegion | Time | Lat/Lon | Depth | Magnitude | Reason |
| 97.274536 | 69.6 deg | 176.735 deg | Near Coast Of Central Chile | 2015/09/16 22:54:31 GMT | (-31.6, -71.8) | 12 km | 8.3 MWW, 7.9 MI | |
| 93.666725 | 51.9 deg | 321.221 deg | Southern Alaska | 2015/07/29 02:35:58 GMT | (59.9, -153.1) | 118 km | 6.3 ML, 6.2 MWP, 6.2 MI, 6.3 MWW | |
| 92.7677 | 81.3 deg | 179.38 deg | Southern Chile | 2016/12/25 14:22:28 GMT | (-43.3, -74.5) | 15 km | 7.7 Mi | |
| 92.622246 | 54.4 deg | 317.919 deg | Alaska Peninsula | 2015/05/29 07:00:08 GMT | (56.7, -156.5) | 62 km | 6.8 MWP, 6.8 MI | |
| 87.83235 | 71.8 deg | 325.366 deg | Near Islands, Aleutian Islands | 2017/06/02 22:24:47 GMT | (54.0, 170.9) | 8.2 km | 6.8 Mww | |
| 85.948746 | 32.7 deg | 241.022 deg | Off Coast Of Jalisco, Mexico | 2016/06/07 10:51:38 GMT | (18.4, -105.2) | 10 km | 6.2 MWP | |
| 85.67101 | 69.0 deg | 176.506 deg | Near Coast Of Central Chile | 2015/11/07 07:31:42 GMT | (-30.9, -71.5) | 36 km | 6.8 MWP, 6.8 MI | |
| 85.150406 | 48.8 deg | 174.284 deg | Peru-Brazil Border Region | 2015/11/24 22:45:38 GMT | (-10.6, -71.0) | 602 km | 7.5 MWW, 6.9 MI | |
| 83.8328 | 31.4 deg | 175.565 deg | Northern Colombia | 2015/03/10 20:55:43 GMT | (6.8, -73.0) | 147 km | 6.2 MWB | |
| 83.23286 | 69.2 deg | 176.577 deg | Near Coast Of Central Chile | 2015/09/17 01:41:09 GMT | (-31.2, -71.6) | 37 km | 5.6 MB | |
| 80.499954 | 73.2 deg | 330.917 deg | Near East Coast Of Kamchatka | 2017/03/29 04:09:24 GMT | (56.9, 162.7) | 23 km | 6.6 Mww | |
| 80.27035 | 37.9 deg | 187.015 deg | Near Coast Of Ecuador | 2016/05/18 16:46:44 GMT | (0.5, -79.6) | 31 km | 6.8 MO | |
| 79.57124 | 58.3 deg | 167.28 deg | Southern Bolivia | 2017/02/21 14:09:04 GMT | (-19.3, -63.9) | 598 km | 6.5 Mww | |
| 79.30944 | 69.6 deg | 176.749 deg | Near Coast Of Central Chile | 2015/09/17 04:10:31 GMT | (-31.5, -71.8) | 40 km | 6.3 MB | |
| 79.02644 | 38.7 deg | 188.215 deg | Near Coast Of Ecuador | 2016/04/17 00:29:31 GMT | (-0.3, -80.5) | 16 km | 5.5 MB | |
| 78.206825 | 47.5 deg | 174.545 deg | Peru-Brazil Border Region | 2015/11/26 05:45:18 GMT | (-9.2, -71.3) | 604 km | 6.4 MWP | |
| 77.59594 | 77.0 deg | 330.718 deg | Kamchatka Peninsula, Russia | 2016/01/30 03:25:10 GMT | (54.0, 158.5) | 161 km | 7.2 MWW, 7.0 MI, 7.2 MWB | |
| 76.53709 | 37.8 deg | 188.043 deg | Near Coast Of Ecuador | 2016/04/20 08:33:48 GMT | (0.6, -80.3) | 16 km | 6.1 MO | |
| 72.91748 | 68.9 deg | 176.355 deg | Near Coast Of Central Chile | 2015/09/26 02:51:18 GMT | (-30.8, -71.4) | 38 km | 6.2 MO | |
| 72.47431 | 43.6 deg | 320.106 deg | Southeastern Alaska | 2017/05/01 12:31:53 GMT | (59.9, -136.6) | 0.1 km | 6.5 Ml | |
| 72.46127 | 63.0 deg | 316.442 deg | Fox Islands, Aleutian Islands | 2015/07/27 06:19:31 GMT | (52.2, -169.2) | 21 km | 5.0 mb | |
| 71.80107 | 70.4 deg | 177.081 deg | Off Coast Of Central Chile | 2015/09/19 12:52:19 GMT | (-32.3, -72.1) | 11 km | 6.2 MWB | |
| 71.01796 | 65.3 deg | 317.29 deg | Andreanof Islands, Aleutian Is. | 2015/11/09 16:03:45 GMT | (51.7, -173.1) | 10 km | 6.2 MWB, 6.3 MI | |
| 69.99913 | 37.8 deg | 187.065 deg | Near Coast Of Ecuador | 2016/07/11 02:11:04 GMT | (0.6, -79.7) | 19 km | 6.3 MWW, 6.3 MWC, 6.3 MWB | |
| 68.9021 | 61.7 deg | 171.965 deg | Chile-Argentina Border Region | 2017/04/15 08:19:41 GMT | (-23.2, -67.7) | 135 km | 6.2 Mww | |
| 68.06689 | 71.0 deg | 177.033 deg | Off Coast Of Central Chile | 2017/04/24 21:38:24 GMT | (-33.0, -72.0) | 33 km | 6.7 Mi | |
| 67.81609 | 92.9 deg | 332.584 deg | Hokkaido, Japan Region | 2016/01/14 03:25:34 GMT | (42.0, 142.7) | 51 km | 6.7 MWP, 6.7 MI | |
| 66.95243 | 40.9 deg | 179.948 deg | Peru-Ecuador Border Region | 2017/04/18 17:49:55 GMT | (-2.7, -75.3) | 11 km | 6.0 Mww | |
| 66.4182 | 65.9 deg | 317.468 deg | Andreanof Islands, Aleutian Is. | 2016/03/12 18:06:45 GMT | (51.6, -174.0) | 19 km | 6.3 MWW, 6.1 MB, 6.2 MWB, 6.3 MWC, 6.4 MWC, 6.4 MI | |
| 65.836395 | 69.8 deg | 176.638 deg | Near Coast Of Central Chile | 2015/09/21 17:39:58 GMT | (-31.7, -71.6) | 25 km | 6.5 MB, 6.5 MI, 6.6 MWW | |
| 65.736786 | 34.8 deg | 178.513 deg | Colombia | 2016/10/31 00:20:11 GMT | (3.4, -74.5) | 33 km | 5.6 MWW, 5.4 MWB | |
| 65.418915 | 74.8 deg | 52.317 deg | Aegean Sea | 2017/06/12 12:28:38 GMT | (38.9, 26.4) | 10 km | 6.3 Mww | |
| 64.64185 | 69.2 deg | 176.58 deg | Near Coast Of Central Chile | 2015/09/19 09:07:08 GMT | (-31.1, -71.6) | 23 km | 6.1 MWP | |
| 63.782913 | 57.1 deg | 221.759 deg | Central East Pacific Rise | 2016/12/11 14:33:12 GMT | (-9.1, -109.8) | 10 km | 5.7 Mwb | |
| 62.36029 | 37.8 deg | 187.04 deg | Near Coast Of Ecuador | 2016/07/11 02:01:09 GMT | (0.6, -79.6) | 14 km | 5.8 MWW, 5.7 MWB, 5.9 MWC | |
| 59.077938 | 30.6 deg | 115.645 deg | Northern Mid-Atlantic Ridge | 2015/08/14 18:03:03 GMT | (21.1, -45.9) | 13 km | 5.5 MB | |
| 58.9093 | 69.8 deg | 176.624 deg | Near Coast Of Central Chile | 2015/08/12 00:14:40 GMT | (-31.7, -71.6) | 30 km | 5.5 MWW, 5.3 MWR, 5.4 MWB | |
| 57.722103 | 61.1 deg | 174.283 deg | Northern Chile | 2017/01/11 21:58:17 GMT | (-22.8, -69.9) | 69 km | 5.9 Mww | |
| 57.36097 | 57.0 deg | 118.935 deg | Central Mid-Atlantic Ridge | 2016/01/27 15:11:17 GMT | (1.0, -28.1) | 10 km | 5.7 mwc | |
| 57.005234 | 78.6 deg | 205.01 deg | Southern East Pacific Rise | 2015/06/09 06:41:38 GMT | (-35.4, -105.8) | 10 km | 5.5 MWC, 5.4 MWB, 5.5 MWC | |
| 56.243004 | 90.2 deg | 331.416 deg | Hokkaido, Japan Region | 2015/03/25 06:30:01 GMT | (43.7, 145.9) | 120 km | 4.3 mb, 4.3 mb | |
| 55.406425 | 32.7 deg | 193.42 deg | South Of Panama | 2016/11/12 20:08:46 GMT | (6.1, -82.6) | 10 km | 5.6 Mwb | |
| 54.695133 | 71.2 deg | 176.884 deg | Near Coast Of Central Chile | 2017/04/28 16:05:55 GMT | (-33.1, -71.8) | 14 km | 5.7 Mww | |
| 53.863953 | 48.3 deg | 174.377 deg | Peru-Brazil Border Region | 2015/11/24 22:50:53 GMT | (-10.1, -71.1) | 595 km | 5.9 MB | |
| 53.428795 | 64.0 deg | 173.983 deg | Northern Chile | 2016/06/24 21:29:18 GMT | (-25.7, -69.3) | 122 km | 5.5 MB | |
| 52.459724 | 60.8 deg | 172.566 deg | Northern Chile | 2015/06/10 13:52:08 GMT | (-22.4, -68.3) | 122 km | 6.0 MO | |
| 50.916042 | 51.7 deg | 320.77 deg | Southern Alaska | 2017/03/02 02:11:30 GMT | (59.6, -152.6) | 77 km | 5.5 Ml | |
| 50.78894 | 94.7 deg | 331.437 deg | Near East Coast Of Honshu, Japan | 2015/02/16 23:06:27 GMT | (39.8, 142.9) | 23 km | 6.7 MWW, 6.9 MI | |
| 50.22419 | 43.0 deg | 181.463 deg | Northern Peru | 2017/01/02 13:13:48 GMT | (-4.9, -76.3) | 108 km | 5.9 Mwb | |
| 48.75463 | 69.6 deg | 176.74 deg | Near Coast Of Central Chile | 2017/06/12 02:43:26 GMT | (-31.5, -71.8) | 26 km | 5.6 Mww | |
| 47.06944 | 97.6 deg | 331.207 deg | Near East Coast Of Honshu, Japan | 2017/01/04 17:53:20 GMT | (37.1, 141.3) | 10 km | 5.6 mb | |
| 46.91234 | 38.8 deg | 188.328 deg | Near Coast Of Ecuador | 2016/04/22 03:03:42 GMT | (-0.3, -80.5) | 10 km | 6.0 MO | |
| 46.37306 | 62.7 deg | 171.519 deg | Chile-Argentina Border Region | 2016/06/18 17:29:44 GMT | (-24.2, -67.1) | 167 km | 5.5 MB | |
| 45.59302 | 97.3 deg | 331.253 deg | Near East Coast Of Honshu, Japan | 2016/12/19 16:41:14 GMT | (37.5, 141.5) | 27 km | 5.5 mb | |
| 45.215168 | 69.9 deg | 174.031 deg | San Juan Province, Argentina | 2016/11/20 20:57:43 GMT | (-31.6, -68.8) | 116 km | 6.4 MWP, 6.5 MWB | |
| 44.654305 | 66.4 deg | 317.977 deg | Andreanof Islands, Aleutian Is. | 2015/08/15 20:16:21 GMT | (51.7, -175.2) | 32 km | 5.6 MWB, 5.5 MI, 5.6 ML, 5.6 MWC | |
| 44.366287 | 37.1 deg | 187.018 deg | Near Coast Of Ecuador | 2015/05/30 06:26:06 GMT | (1.2, -79.6) | 26 km | 5.4 MW, 5.3 mb, 4.8 MS | |
| 43.40754 | 96.7 deg | 25.291 deg | Tajikistan | 2017/05/03 04:47:13 GMT | (39.5, 71.4) | 10 km | 5.9 Mww | |
| 40.13929 | 66.0 deg | 317.496 deg | Andreanof Islands, Aleutian Is. | 2016/03/19 01:35:12 GMT | (51.5, -174.2) | 17 km | 6.0 MWW, 5.5 ML, 5.8 MWB | |
| 38.959194 | 69.9 deg | 176.581 deg | Near Coast Of Central Chile | 2015/09/16 23:03:56 GMT | (-31.8, -71.6) | 10 km | 6.1 MB | |
| 38.762577 | 70.1 deg | 320.041 deg | Rat Islands, Aleutian Islands | 2015/05/31 18:07:49 GMT | (51.2, 178.3) | 36 km | 5.0 MW, 5.1 mb, 4.0 MS | |
| 37.95415 | 89.2 deg | 330.339 deg | Kuril Islands | 2015/07/07 05:10:27 GMT | (44.0, 147.9) | 38 km | 6.3 MO | |
| 37.061512 | 30.9 deg | 181.471 deg | Northern Colombia | 2016/09/14 01:58:30 GMT | (7.3, -76.1) | 10 km | 5.9 MWP | |
| 36.638157 | 56.5 deg | 119.751 deg | Central Mid-Atlantic Ridge | 2016/07/24 14:10:51 GMT | (0.9, -29.0) | 10 km | 5.7 mwb | |
| 33.710102 | 40.0 deg | 304.577 deg | Vancouver Island, Canada Region | 2016/03/18 22:46:56 GMT | (49.7, -129.9) | 10 km | 5.5 MWW, 5.4 MWB, 5.5 MWC | |
| 33.619076 | 59.2 deg | 315.189 deg | South Of Alaska | 2015/03/12 19:47:14 GMT | (52.9, -162.9) | 12 km | 5.2 MW | |
| 32.596157 | 32.4 deg | 193.682 deg | South Of Panama | 2015/03/09 02:48:45 GMT | (6.5, -82.7) | 10 km | 5.6 MO | |
| 28.713173 | 68.5 deg | 176.96 deg | Off Coast Of Central Chile | 2016/02/22 06:37:03 GMT | (-30.5, -72.1) | 10 km | 5.9 MWB | |
| 19.96783 | 90.0 deg | 331.303 deg | Kuril Islands | 2015/07/25 15:36:38 GMT | (43.8, 146.2) | 105 km | 3.7 mb | |
| 18.986311 | 77.5 deg | 55.189 deg | Crete, Greece | 2015/04/16 19:02:14 GMT | (35.1, 26.9) | 25 km | 5.0 MW, 5.0 mb, 4.8 MS |
