Station TA 155A - Kite, GA, USA

Network: TA - USArray Transportable Network (new EarthScope stations)

Nearby stations (2 deg radius)

Station Name (Lat, Lon) Start / End Elevation
155A Kite, GA, USA (32.62, -82.47) 2012-03-21 / 2599-12-31 93 m
Crust2 Type:DG,thin Platform 1 km seds.
Thickness Estimate:36 km
Thickness StdDev:2.8 km
Vp/Vs Estimate:1.68
Vp/Vs StdDev:0.03
Vs Estimate:3.902 km/s
Poisson's Ratio:0.23
Peak Value:0.05
Assumed Vp:6.565 km/s
Ps Weight:0.33333334
PpPs Weight:0.33333334
PsPs Weight:0.33333328
Residual Complexity:0.632
Nearby stations H: +-
(2.0 deg) Vp/Vs: +-

14 with match > 90% ( 14.0 %) and 32 with match > 80% ( 32.0 %) out of 100.

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 36 km 1.68 6.565 km/s 3.902 km/s 0.23
Crust2.0 31 km 1.78 6.565 km/s 3.684 km/s 0.27 DG,thin Platform 1 km seds.
Global Maxima 36 km 1.68 6.565 km/s 3.902 km/s 0.23 amp=0.052128844
Local Maxima 1 45 km 1.60 6.565 km/s 4.103 km/s 0.18 amp=0.03898127
Local Maxima 2 26 km 1.98 6.565 km/s 3.324 km/s 0.33 amp=0.023380589
Local Maxima 3 37 km 1.73 6.565 km/s 3.8 km/s 0.25 amp=0.022216102
Local Maxima 4 44 km 1.60 6.565 km/s 4.103 km/s 0.18 amp=0.015255217
Predicted Arrivals for vertical incidence
(zero ray parameter)
Ps3.77 SECOND
PpPs14.81 SECOND
PsPs/PpSs18.58 SECOND

Events Processed for this Station

Download zip of receiver functions as SAC

View Record Section

Plot maxima for each earthquake.

Events Used in the Stack

(32 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude
98.19154 80.6 deg 331.076 deg Sea Of Okhotsk 2013/05/24 05:44:48 GMT (54.9, 153.2) 598 km 8.4 MW, 7.5 MB, 8.3 MW
96.96222 88.0 deg 326.173 deg Kuril Islands 2013/04/19 03:05:52 GMT (46.2, 150.8) 110 km 7.2 MW, 7.1 MB, 7.2 MW
96.29821 48.8 deg 169.8 deg Near Coast Of Peru 2013/09/25 16:42:43 GMT (-15.8, -74.5) 40 km 7.1 MWW, 6.8 MI, 7.0 MWB, 7.0 MWC, 7.1 MWW, 7.1 MWC
95.60149 51.5 deg 164.252 deg Peru-Bolivia Border Region 2012/05/14 10:00:40 GMT (-17.7, -69.6) 106 km 6.4 MB, 6.2 MW, 6.2 MW
95.38388 41.6 deg 167.705 deg Peru-Brazil Border Region 2012/08/02 09:38:30 GMT (-8.4, -74.3) 145 km 5.9 MB, 6.1 MW, 6.1 MW
94.61153 68.5 deg 318.177 deg Andreanof Islands, Aleutian Is. 2012/09/26 23:39:55 GMT (51.6, -178.3) 16 km 6.3 MB, 6.5 MS, 6.4 MW, 6.4 MW
94.44542 63.4 deg 169.419 deg Near Coast Of Central Chile 2013/10/31 23:03:59 GMT (-30.3, -71.5) 27 km 6.6 MWW, 6.4 MWB, 6.5 MWC, 6.6 MWW, 6.6 MI
93.07954 83.3 deg 329.971 deg Sea Of Okhotsk 2013/05/24 14:56:31 GMT (52.2, 151.4) 624 km 6.7 MW, 6.7 MB, 6.7 MW
92.95002 58.6 deg 20.193 deg Norwegian Sea 2012/05/24 22:47:46 GMT (73.0, 5.7) 10 km 5.7 MB, 6.1 MS, 6.1 MW, 6.2 MW
92.79287 37.8 deg 179.123 deg Near Coast Of Northern Peru 2013/08/12 09:49:32 GMT (-5.4, -81.9) 10 km 6.2 MWW, 6.1 MWB, 6.2 MWW, 6.2 MWC, 6.3 MWC
91.65757 82.9 deg 52.315 deg Crete, Greece 2013/10/12 13:11:53 GMT (35.5, 23.3) 40 km 6.6 MWW, 6.5 MWB, 6.6 MWW, 6.7 MWC
91.60441 42.6 deg 111.565 deg Northern Mid-Atlantic Ridge 2013/06/24 22:04:13 GMT (10.7, -42.6) 10 km 6.5 MW, 6.1 MB, 6.3 MS, 6.6 MW
90.41581 49.1 deg 166.276 deg Southern Peru 2013/07/17 02:37:43 GMT (-15.7, -71.7) 7.0 km 6.0 MW, 5.6 MB, 5.8 MS, 5.8 MW
90.09816 66.8 deg 317.264 deg Andreanof Islands, Aleutian Is. 2013/08/30 16:25:02 GMT (51.5, -175.2) 29 km 7.0 MWW, 6.5 ML, 6.8 MI, 6.9 MWC, 6.9 MWB, 7.0 MWW, 7.0 MI, 7.0 MWC
88.63775 39.4 deg 312.688 deg Queen Charlotte Islands Region 2013/09/03 20:19:06 GMT (51.2, -130.4) 2.7 km 6.1 MWW, 6.0 MWB, 6.1 MWW, 6.1 MWC, 6.2 MI, 6.2 MWC
88.44905 66.5 deg 317.16 deg Andreanof Islands, Aleutian Is. 2013/09/04 02:32:30 GMT (51.6, -174.8) 20 km 6.5 MWW, 5.9 ML, 6.3 MWB, 6.5 MI, 6.5 MWC, 6.5 MWW
87.88095 31.7 deg 170.308 deg Colombia 2013/02/09 14:16:07 GMT (1.1, -77.4) 145 km 6.7 MB, 6.9 MW, 6.9 MW
87.58218 76.8 deg 327.354 deg Near East Coast Of Kamchatka 2013/11/12 07:03:51 GMT (54.7, 162.3) 43 km 6.4 MWW, 6.3 MWC, 6.4 MWW, 6.4 MWB, 6.5 MWC, 6.6 MI
87.30317 38.0 deg 108.263 deg Northern Mid-Atlantic Ridge 2013/09/05 04:01:36 GMT (15.2, -45.2) 10 km 6.0 MWW, 5.9 MWB, 6.0 MWW, 6.0 MWC
86.3029 74.5 deg 343.696 deg Eastern Siberia, Russia 2013/02/14 13:13:53 GMT (67.6, 142.5) 11 km 6.5 MB, 6.7 MS, 6.6 MW, 6.7 MW
86.24012 61.4 deg 168.113 deg Central Chile 2013/01/30 20:15:43 GMT (-28.1, -70.7) 45 km 6.5 MB, 6.5 MS, 6.8 MW, 6.8 MW
84.548325 88.3 deg 325.424 deg Kuril Islands 2012/07/08 11:33:02 GMT (45.5, 151.3) 20 km 5.7 MB, 5.6 MS, 6.0 MW, 5.8 MW
84.03858 81.6 deg 326.472 deg Kuril Islands 2013/02/28 14:05:50 GMT (51.0, 157.3) 41 km 6.4 MB, 6.7 MS, 6.9 MW, 6.8 MW
83.78943 39.3 deg 312.621 deg Queen Charlotte Islands Region 2013/09/04 00:23:11 GMT (51.2, -130.2) 9.9 km 6.0 MW, 5.9 MI, 5.9 MWR, 6.0 MWW, 6.0 MWW, 6.0 MWC
83.765495 47.2 deg 170.919 deg Near Coast Of Peru 2012/07/02 23:31:37 GMT (-14.4, -75.6) 40 km 6.0 MB, 5.2 MS, 5.7 MW, 5.6 MW
83.20819 46.7 deg 67.042 deg Azores Islands Region 2013/04/30 06:25:23 GMT (37.6, -24.9) 10 km 5.8 MW, 5.9 MW, 5.9 MB
82.794014 66.5 deg 317.164 deg Andreanof Islands, Aleutian Is. 2013/09/15 16:21:37 GMT (51.6, -174.7) 24 km 6.1 MWW, 5.7 MI, 5.7 ML, 6.0 MWB, 6.1 MWC, 6.1 MWW
82.75628 79.3 deg 326.363 deg Off East Coast Of Kamchatka 2013/05/19 18:44:10 GMT (52.3, 160.1) 18 km 6.1 MW, 5.8 MS, 5.9 MB, 5.9 MW
81.67656 61.9 deg 316.522 deg Fox Islands, Aleutian Islands 2012/08/10 18:37:43 GMT (52.6, -167.4) 13 km 5.9 MB, 6.2 MS, 6.2 MW, 6.2 MW
81.59983 81.5 deg 326.421 deg Kuril Islands 2013/03/01 13:20:49 GMT (51.0, 157.4) 29 km 6.3 MB, 6.3 MS, 6.5 MW, 6.4 MW
81.41556 66.6 deg 317.182 deg Andreanof Islands, Aleutian Is. 2013/09/04 06:16:49 GMT (51.6, -174.8) 21 km 5.7 MWW, 5.5 ML, 5.5 MI, 5.7 MWB, 5.7 MWW, 5.8 MWC
80.721306 55.7 deg 163.865 deg Chile-Bolivia Border Region 2012/10/08 01:50:26 GMT (-21.7, -68.2) 122 km 6.0 MB, 5.7 MW, 5.8 MW

Losers

(68 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude Reason
78.94078 37.4 deg 169.522 deg Northern Peru 2012/11/28 03:09:48 GMT (-4.5, -76.1) 118 km 5.9 MB, 5.6 MW, 5.7 MW
78.554794 82.0 deg 330.054 deg Sea Of Okhotsk 2013/10/01 03:38:21 GMT (53.2, 152.8) 573 km 6.7 MWW, 6.7 MWC, 6.8 MWC, 6.8 MWB
78.07535 31.5 deg 277.367 deg Off W. Coast Of Baja California 2012/12/14 10:36:01 GMT (31.1, -119.7) 13 km 6.2 MB, 6.1 MS, 6.3 MW, 6.4 MW
76.36183 97.8 deg 323.771 deg Off East Coast Of Honshu, Japan 2013/10/25 17:10:19 GMT (37.2, 144.7) 35 km 7.1 MWW, 7.1 MWW, 7.1 MWB, 7.1 MWC, 7.2 MWC, 7.5 MI
75.01927 42.6 deg 318.273 deg Southeastern Alaska 2013/01/05 08:58:19 GMT (55.4, -134.7) 10 km 6.4 MB, 7.7 MS, 7.5 MW, 7.5 MW
73.93917 47.2 deg 166.427 deg Central Peru 2013/05/21 23:02:45 GMT (-13.8, -72.3) 92 km 5.8 MW, 5.7 MB, 5.8 MW
73.39283 56.2 deg 164.493 deg Northern Chile 2013/08/23 08:34:06 GMT (-22.3, -68.6) 111 km 5.8 MWW, 5.7 MWD, 5.8 MWW, 5.8 MWB, 5.8 MWC
71.98639 97.7 deg 324.809 deg Off East Coast Of Honshu, Japan 2012/12/07 08:31:14 GMT (37.9, 143.8) 32 km 6.1 MB, 6.2 MW, 6.2 MW
71.317696 66.5 deg 317.016 deg Andreanof Islands, Aleutian Is. 2013/09/05 05:43:39 GMT (51.5, -174.6) 20 km 5.6 MWW, 5.4 MI, 5.5 MWB, 5.6 MWW, 5.7 MWC, 5.7 ML, 5.8 MWC
70.644325 80.7 deg 49.94 deg Greece 2013/08/07 09:06:52 GMT (38.7, 22.7) 0.1 km 5.5 MW, 5.3 MWR, 5.5 MWC
70.62542 97.2 deg 162.799 deg Scotia Sea 2013/11/17 09:04:55 GMT (-60.3, -46.4) 10 km 7.7 MWW, 7.6 MWC, 7.7 MWW, 7.8 MI, 7.8 MWC
70.42718 66.8 deg 316.887 deg Andreanof Islands, Aleutian Is. 2013/08/31 06:38:36 GMT (51.2, -174.9) 18 km 6.0 MWW, 5.5 ML, 5.9 MWB, 5.9 MWC, 6.0 MWC, 6.0 MI, 6.0 MWW
70.0257 53.2 deg 164.344 deg Northern Chile 2013/07/10 14:32:12 GMT (-19.3, -69.2) 110 km 5.7 MW, 5.6 MW, 5.7 MB
69.94479 86.5 deg 49.48 deg Eastern Mediterranean Sea 2012/07/09 13:55:00 GMT (35.6, 28.9) 56 km 5.6 MB, 5.6 MW, 5.6 MW
69.23996 73.1 deg 322.948 deg Near Islands, Aleutian Islands 2012/06/19 15:56:32 GMT (53.4, 171.6) 14 km 6.2 MB, 5.7 MS, 6.0 MW, 6.1 MW
69.09317 57.3 deg 159.066 deg Salta Province, Argentina 2012/06/02 07:52:53 GMT (-22.1, -63.6) 527 km 5.8 MB, 5.9 MW, 6.0 MW
67.0804 82.1 deg 325.573 deg East Of Kuril Islands 2013/04/19 19:58:40 GMT (50.0, 157.7) 15 km 6.1 MW, 5.9 MB, 6.0 MW, 6.1 MS
66.63829 50.1 deg 28.198 deg Iceland Region 2012/10/21 01:25:22 GMT (66.3, -18.7) 10 km 5.5 MW, 5.2 MS, 5.4 MB, 5.6 MW
66.11454 66.6 deg 317.199 deg Andreanof Islands, Aleutian Is. 2013/09/04 06:27:03 GMT (51.6, -174.9) 17 km 6.0 MWW, 5.5 ML, 5.9 MWB, 6.0 MWW, 6.1 MWC, 6.1 MI
65.429146 87.8 deg 47.932 deg Turkey 2013/12/28 15:21:04 GMT (36.0, 31.3) 41 km 5.9 MWW, 5.9 MWB, 6.0 MWC
65.422195 37.3 deg 310.682 deg Vancouver Island, Canada Region 2013/08/04 13:22:27 GMT (49.7, -127.4) 10 km 5.6 MB, 5.5 MW
65.39158 64.6 deg 317.402 deg Fox Islands, Aleutian Islands 2013/05/12 20:06:41 GMT (52.5, -172.0) 8.0 km 5.7 MB, 5.1 MS, 5.4 MW, 5.3 MW
63.989655 83.3 deg 325.941 deg Kuril Islands 2012/07/20 06:10:25 GMT (49.4, 155.9) 19 km 5.7 MB, 5.7 MS, 6.0 MW, 6.1 MW
63.410965 84.7 deg 52.375 deg Crete, Greece 2013/06/15 16:11:02 GMT (34.4, 25.0) 10 km 6.2 MW, 6.0 MB, 6.0 MS, 6.1 MW
63.190746 89.8 deg 119.705 deg South Atlantic Ocean 2012/06/29 15:31:46 GMT (-24.7, -9.7) 10 km 6.0 MB, 5.2 MS, 5.8 MW, 5.8 MW
63.02617 63.0 deg 160.766 deg Santiago Del Estero Prov., Arg. 2013/02/22 12:01:58 GMT (-27.9, -63.1) 575 km 5.8 MB, 6.1 MW, 6.2 MW
62.161125 62.0 deg 315.339 deg Fox Islands, Aleutian Islands 2013/07/03 03:40:27 GMT (51.6, -167.0) 5.1 km 5.8 MW, 5.7 MW, 5.9 MB
62.13758 62.9 deg 211.137 deg Easter Island Region 2013/11/02 15:52:46 GMT (-23.6, -112.6) 10 km 6.0 MWW, 5.9 MWB, 6.0 MWW, 6.0 MWC, 6.1 MWC
61.75315 91.1 deg 170.879 deg Drake Passage 2012/04/14 10:56:19 GMT (-57.7, -65.3) 15 km 6.1 MB, 6.1 MS, 6.2 MW, 6.2 MW
61.083157 73.9 deg 324.743 deg Komandorskiye Ostrova Region 2012/05/29 02:40:53 GMT (54.4, 168.9) 10 km 5.5 MS, 5.4 MB, 5.6 MW, 5.6 MW
60.95196 31.8 deg 294.844 deg Northern California 2013/05/24 03:47:08 GMT (40.2, -121.1) 9.7 km 5.7 MW, 5.7 MB, 5.7 MW
60.75828 90.0 deg 325.833 deg Kuril Islands 2013/12/08 17:24:54 GMT (44.4, 149.2) 28 km 6.0 MWW, 5.9 MWB, 6.1 MWC
59.911736 68.5 deg 318.23 deg Andreanof Islands, Aleutian Is. 2013/04/21 13:48:29 GMT (51.7, -178.2) 44 km 5.6 MW, 5.7 MW, 5.9 MB
59.504093 94.1 deg 328.19 deg Hokkaido, Japan Region 2013/02/02 14:17:35 GMT (42.8, 143.1) 107 km 6.4 MB, 6.9 MW, 6.9 MW
59.206318 82.9 deg 325.855 deg Kuril Islands 2012/10/16 12:41:25 GMT (49.6, 156.4) 81 km 6.2 MB, 5.6 MW, 5.6 MW
59.182896 92.9 deg 6.645 deg Southwestern Siberia, Russia 2013/06/18 23:02:09 GMT (54.3, 86.2) 9.9 km 5.6 MB
59.066936 84.8 deg 52.35 deg Crete, Greece 2013/06/16 21:39:05 GMT (34.3, 25.2) 19 km 6.0 MW, 5.7 MS, 5.8 MW, 5.9 MB
58.99349 81.1 deg 50.398 deg Greece 2012/09/22 03:52:26 GMT (38.1, 22.8) 10 km 5.6 MB, 5.0 MW, 5.1 ML
57.84539 83.2 deg 325.8 deg Kuril Islands 2012/07/20 06:32:56 GMT (49.4, 156.1) 10 km 5.8 MB, 5.5 MS, 5.8 MW, 5.9 MW
57.474136 88.1 deg 325.199 deg Kuril Islands 2012/07/12 12:51:58 GMT (45.5, 151.7) 12 km 5.5 MB, 5.6 MS, 5.8 MW, 5.7 MW
57.35041 80.3 deg 325.079 deg East Of Kuril Islands 2013/03/24 04:18:33 GMT (50.7, 160.2) 8.0 km 6.1 MB, 5.5 MS, 5.9 MW, 6.1 MW
57.209724 97.6 deg 324.678 deg Off East Coast Of Honshu, Japan 2012/12/07 08:18:23 GMT (37.9, 143.9) 31 km 7.2 MB, 7.3 MS, 7.3 MW, 7.3 MW
57.043762 67.0 deg 170.435 deg Near Coast Of Central Chile 2012/11/21 21:36:22 GMT (-33.9, -71.9) 18 km 5.7 MB, 5.5 MS, 5.9 MW, 5.8 MW
56.426872 37.8 deg 307.451 deg Off Coast Of Washington 2012/08/19 08:07:35 GMT (47.8, -128.6) 10 km 5.6 MW, 5.3 MS, 5.2 MB, 5.5 MW
55.737362 79.3 deg 326.369 deg Off East Coast Of Kamchatka 2013/05/21 04:59:35 GMT (52.3, 160.1) 18 km 5.7 MW, 5.6 MS, 5.7 MW
55.060795 48.8 deg 168.277 deg Southern Peru 2013/05/14 23:39:15 GMT (-15.7, -73.3) 105 km 5.5 MW, 5.5 MW, 5.7 MB
54.80605 83.5 deg 325.896 deg Kuril Islands 2012/09/09 05:39:37 GMT (49.2, 155.8) 31 km 5.5 MB, 5.5 MS, 5.9 MW, 6.0 MW
54.700836 63.1 deg 160.802 deg Santiago Del Estero Prov., Arg. 2012/05/28 05:07:23 GMT (-28.0, -63.1) 587 km 6.0 MB, 6.7 MW, 6.8 MW
54.464306 73.1 deg 322.921 deg Near Islands, Aleutian Islands 2012/06/19 20:56:41 GMT (53.4, 171.7) 12 km 5.9 MB, 5.2 MS, 5.6 MW, 5.7 MW
54.220455 70.1 deg 49.016 deg Northern Italy 2012/05/29 07:00:03 GMT (44.9, 11.1) 10 km 5.9 MB, 5.8 MS, 5.8 MW, 5.8 MW
51.889492 82.0 deg 329.84 deg Sea Of Okhotsk 2013/05/24 06:03:07 GMT (53.0, 153.0) 514 km 5.5 MB
51.85626 53.5 deg 319.69 deg Kodiak Island Region, Alaska 2012/09/18 01:44:50 GMT (56.9, -154.1) 39 km 5.5 MB, 4.7 MS, 5.2 MW, 5.1 MW
51.766113 70.1 deg 49.007 deg Northern Italy 2012/05/29 10:55:57 GMT (44.9, 11.0) 6.8 km 5.6 MB, 5.3 MS, 5.5 MW, 5.4 MW
51.444416 57.9 deg 159.343 deg Salta Province, Argentina 2012/11/22 13:07:10 GMT (-22.7, -63.6) 517 km 5.6 MB, 5.9 MW, 6.0 MW
51.265305 39.3 deg 312.847 deg Queen Charlotte Islands Region 2013/09/03 22:29:31 GMT (51.3, -130.2) 9.9 km 5.5 MW, 5.5 MI, 5.5 MWR, 5.5 MWR, 5.5 MWC
50.30849 51.6 deg 325.036 deg Southern Alaska 2012/12/04 01:42:48 GMT (61.2, -150.8) 62 km 5.6 MB, 5.8 MW, 5.7 MW
50.07947 58.9 deg 167.386 deg Near Coast Of Northern Chile 2013/12/17 12:30:00 GMT (-25.5, -70.5) 72 km 5.5 MWW, 5.4 MWR, 5.5 MWC, 5.6 MWB
49.979298 81.5 deg 326.355 deg Kuril Islands 2013/03/01 12:53:51 GMT (50.9, 157.5) 33 km 5.7 MB, 5.8 MS, 6.4 MW, 6.4 MW
49.659733 36.8 deg 300.607 deg Off Coast Of Oregon 2012/04/11 22:41:46 GMT (43.6, -127.6) 8.0 km 5.8 MB, 5.9 MS, 6.0 MW
47.56292 79.6 deg 109.317 deg Ascension Island Region 2013/11/17 17:37:14 GMT (-10.3, -11.8) 10 km 5.5 MB, 5.4 MWC
47.197422 92.0 deg 333.195 deg Primor'ye, Russia 2012/07/29 09:20:54 GMT (47.4, 139.1) 502 km 5.6 MB, 5.6 MW, 5.7 MW
47.041035 69.0 deg 318.34 deg Andreanof Islands, Aleutian Is. 2013/11/13 03:57:39 GMT (51.5, -179.0) 20 km 5.8 MWW, 5.6 MWB, 5.7 MI, 5.8 MWW, 5.9 MWC, 6.0 ML
46.97062 66.1 deg 168.826 deg Chile-Argentina Border Region 2012/10/11 17:22:09 GMT (-32.9, -70.3) 82 km 5.5 MB, 5.5 MW, 5.6 MW
42.43427 70.2 deg 48.93 deg Northern Italy 2012/05/20 02:03:52 GMT (44.9, 11.2) 6.3 km 5.8 MB, 6.0 MS, 6.0 MW, 6.1 MW
42.03793 88.5 deg 325.535 deg Kuril Islands 2013/06/04 11:00:09 GMT (45.4, 150.9) 24 km 5.6 MW, 5.5 MW
41.394527 57.8 deg 317.945 deg Alaska Peninsula 2012/08/08 14:05:17 GMT (54.9, -161.2) 43 km 5.6 MB, 5.2 MW, 5.1 MW
34.55536 59.1 deg 167.48 deg Near Coast Of Northern Chile 2012/05/19 08:35:10 GMT (-25.7, -70.6) 28 km 5.7 MB, 5.5 MS, 5.8 MW, 5.9 MW
30.158707 97.1 deg 138.042 deg Southern Mid-Atlantic Ridge 2013/06/07 20:13:13 GMT (-43.8, -16.2) 7.2 km 5.7 MW, 5.5 MS, 5.6 MW, 5.8 MB