Station TA Z30A - Sanderson Ranch, Post, TX, USA

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

Nearby stations (2 deg radius)

Station Name (Lat, Lon) Start / End Elevation
Z30A Sanderson Ranch, Post, TX, USA (33.29, -101.13) 2009-03-10 / 2599-12-31 729 m
Crust2 Type:D8,thick Platform 3 km seds.
Thickness Estimate:49 km
Thickness StdDev:2.3 km
Vp/Vs Estimate:1.76
Vp/Vs StdDev:0.05
Vs Estimate:3.641 km/s
Poisson's Ratio:0.26
Peak Value:0.01
Assumed Vp:6.426 km/s
Ps Weight:0.33333334
PpPs Weight:0.33333334
PsPs Weight:0.33333328
Residual Complexity:0.596
Nearby stations H: +-
(2.0 deg) Vp/Vs: +-

19 with match > 90% ( 18.26923 %) and 38 with match > 80% ( 36.53846 %) out of 104.

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 49 km 1.76 6.426 km/s 3.641 km/s 0.26
Crust2.0 46 km 1.78 6.426 km/s 3.613 km/s 0.27 D8,thick Platform 3 km seds.
Global Maxima 49 km 1.76 6.426 km/s 3.641 km/s 0.26 amp=0.010631939
Local Maxima 1 32 km 2.10 6.426 km/s 3.064 km/s 0.35 amp=0.0052227997
Local Maxima 2 45 km 1.94 6.426 km/s 3.312 km/s 0.32 amp=0.0048352513
Local Maxima 3 62 km 1.60 6.426 km/s 4.01 km/s 0.18 amp=0.00368245
Local Maxima 4 49 km 1.73 6.426 km/s 3.725 km/s 0.25 amp=0.0026336138
Predicted Arrivals for vertical incidence
(zero ray parameter)
Ps5.80 SECOND
PpPs20.98 SECOND
PsPs/PpSs26.78 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

(38 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude
98.91596 83.2 deg 246.619 deg Samoa Islands Region 2009/09/29 17:48:10 GMT (-15.5, -172.1) 18 km 7.1 MB, 8.1 MS, 8.1 MW, 8.0 MW
98.76353 89.6 deg 242.05 deg Tonga Islands Region 2009/03/19 18:17:40 GMT (-23.0, -174.7) 34 km 7.0 MB, 7.6 MS, 7.6 MW, 7.6 MW
97.63449 83.4 deg 247.11 deg Samoa Islands Region 2009/08/30 14:51:32 GMT (-15.2, -172.6) 11 km 6.4 MB, 6.3 MS, 6.6 MW, 6.6 MW
97.490906 51.8 deg 314.034 deg Fox Islands, Aleutian Islands 2010/07/18 05:56:44 GMT (52.9, -169.8) 14 km 6.3 MB, 6.7 MS, 6.6 MW, 6.6 MW
97.18016 72.6 deg 154.928 deg Near Coast Of Central Chile 2010/03/11 14:39:43 GMT (-34.3, -71.9) 11 km 6.7 MB, 7.0 MS, 6.9 MW, 6.9 MW
95.921616 69.4 deg 319.831 deg Off East Coast Of Kamchatka 2010/07/30 03:56:13 GMT (52.5, 159.8) 23 km 6.1 MB, 6.3 MS, 6.3 MW, 6.3 MW
95.855576 37.9 deg 118.692 deg Near Coast Of Venezuela 2009/09/12 20:06:24 GMT (10.7, -67.9) 10 km 6.3 MB, 6.4 MS, 6.3 MW, 6.3 MW
95.60845 75.8 deg 157.776 deg Near Coast Of Central Chile 2011/01/02 20:20:17 GMT (-38.4, -73.3) 24 km 6.6 MB, 7.1 MS, 7.1 MW, 7.0 MW
95.34282 77.4 deg 317.055 deg Kuril Islands 2009/04/07 04:23:33 GMT (46.0, 151.5) 31 km 6.5 MB, 6.8 MS, 6.9 MW, 6.9 MW
95.25606 74.6 deg 157.29 deg Near Coast Of Central Chile 2010/09/09 07:28:01 GMT (-37.0, -73.4) 16 km 5.8 MB, 6.0 MS, 6.2 MW, 6.2 MW
94.81077 93.7 deg 313.868 deg Near S. Coast Of Honshu, Japan 2009/08/09 10:55:55 GMT (33.2, 137.9) 297 km 6.5 MB, 7.1 MW, 7.1 MW
94.37728 63.4 deg 145.723 deg Northern Chile 2010/07/12 00:11:21 GMT (-22.1, -68.2) 115 km 6.1 MB, 6.3 MW, 6.2 MW
93.117386 60.3 deg 313.206 deg Rat Islands, Aleutian Islands 2009/07/06 14:53:12 GMT (50.4, 177.0) 22 km 6.0 MB, 5.8 MS, 6.1 MW, 6.0 MW
92.82141 72.8 deg 319.883 deg Kuril Islands 2009/04/21 05:26:11 GMT (50.8, 155.0) 152 km 6.0 MB, 6.2 MW, 6.2 MW
92.55811 62.2 deg 19.871 deg Norwegian Sea 2009/08/20 06:35:04 GMT (72.2, 0.9) 6.0 km 5.9 MB, 5.7 MS, 6.0 MW, 6.0 MW
92.04049 67.4 deg 151.072 deg Near Coast Of Northern Chile 2010/03/26 14:52:07 GMT (-28.0, -70.8) 42 km 6.2 MB, 5.9 MS, 6.3 MW, 6.1 MW
91.98315 92.4 deg 312.202 deg Southeast Of Honshu, Japan 2009/08/12 22:48:51 GMT (32.8, 140.4) 53 km 6.2 MB, 6.6 MW, 6.6 MW
91.94714 84.6 deg 317.31 deg Hokkaido, Japan Region 2009/06/05 03:30:33 GMT (41.8, 143.4) 29 km 6.0 MB, 6.3 MS, 6.4 MW, 6.4 MW
91.34899 88.0 deg 243.581 deg Tonga Islands 2009/07/30 20:05:34 GMT (-20.8, -174.3) 10 km 5.9 MB, 5.7 MS, 5.8 MW, 5.7 MW
89.980225 44.3 deg 10.064 deg Baffin Bay 2009/07/07 19:11:46 GMT (75.4, -72.5) 19 km 5.9 MB, 5.7 MS, 6.1 MW, 6.0 MW
89.64695 44.2 deg 145.135 deg Northern Peru 2010/05/19 04:15:44 GMT (-5.1, -77.5) 140 km 6.0 MB, 6.0 MW, 6.0 MW
88.68274 51.7 deg 313.946 deg Fox Islands, Aleutian Islands 2010/07/18 19:48:04 GMT (52.8, -169.7) 10 km 5.6 MB, 5.6 MS, 6.0 MW, 6.0 MW
88.60976 50.1 deg 313.663 deg Fox Islands, Aleutian Islands 2009/10/13 05:37:23 GMT (52.8, -167.0) 24 km 6.0 MB, 6.1 MS, 6.5 MW, 6.5 MW
87.78722 86.6 deg 316.238 deg Near East Coast Of Honshu, Japan 2010/07/04 21:55:51 GMT (39.7, 142.4) 27 km 6.4 MB, 6.1 MS, 6.3 MW, 6.2 MW
87.6007 48.7 deg 86.164 deg Northern Mid-Atlantic Ridge 2009/06/06 20:33:28 GMT (23.9, -46.1) 14 km 6.0 MB, 5.7 MS, 6.0 MW, 6.0 MW
86.9194 35.1 deg 151.431 deg Off Coast Of Ecuador 2009/05/10 01:16:06 GMT (1.4, -85.2) 6.0 km 5.5 MB, 5.7 MS, 6.1 MW, 6.1 MW
86.00374 31.2 deg 134.08 deg Panama 2009/07/04 06:49:35 GMT (9.6, -79.0) 38 km 6.0 MB, 5.5 MS, 6.0 MW, 6.0 MW
85.82736 73.9 deg 156.828 deg Near Coast Of Central Chile 2010/03/16 02:21:57 GMT (-36.2, -73.3) 18 km 6.0 MB, 6.7 MS, 6.7 MW, 6.6 MW
85.752495 50.2 deg 313.476 deg Fox Islands, Aleutian Islands 2009/10/13 20:21:53 GMT (52.6, -167.1) 14 km 5.9 MB, 6.4 MS, 6.4 MW, 6.4 MW
85.58771 87.5 deg 243.699 deg Tonga Islands 2010/10/16 20:08:30 GMT (-20.4, -173.8) 8.0 km 6.1 MB, 5.9 MS, 5.9 MW, 5.8 MW
84.53441 42.0 deg 319.57 deg Kodiak Island Region, Alaska 2009/03/30 07:13:07 GMT (56.5, -152.7) 21 km 5.9 MB, 5.9 MS, 5.9 MW, 5.9 MW
84.51474 56.4 deg 143.501 deg Southern Peru 2009/09/05 03:58:39 GMT (-15.1, -70.2) 210 km 5.8 MW, 5.2 MB, 5.8 MW
81.91582 63.0 deg 190.935 deg Easter Island Region 2009/09/17 23:21:38 GMT (-29.1, -112.3) 10 km 5.7 MB, 6.0 MS, 6.2 MW, 6.2 MW
81.85328 63.5 deg 145.868 deg Northern Chile 2010/03/04 22:39:26 GMT (-22.2, -68.3) 114 km 6.3 MB, 6.4 MW, 6.3 MW
80.829384 74.6 deg 317.959 deg Kuril Islands 2009/09/10 02:46:50 GMT (48.3, 154.2) 36 km 6.0 MB, 5.5 MS, 6.0 MW, 5.8 MW
80.8217 54.3 deg 66.724 deg Azores Islands Region 2009/11/04 18:41:44 GMT (36.2, -33.9) 10 km 5.7 MB, 5.6 MS, 5.9 MW, 5.8 MW
80.05353 97.5 deg 237.309 deg Kermadec Islands Region 2009/05/16 00:53:52 GMT (-31.5, -178.8) 55 km 6.1 MB, 6.5 MW, 6.3 MW
80.03311 72.4 deg 156.563 deg Off Coast Of Central Chile 2010/10/21 02:49:56 GMT (-34.7, -73.7) 10 km 5.9 MB, 5.5 MS, 5.9 MW, 5.8 MW

Losers

(66 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude Reason
79.15277 74.3 deg 157.106 deg Near Coast Of Central Chile 2010/03/05 11:47:06 GMT (-36.7, -73.4) 18 km 6.1 MB, 6.7 MS, 6.6 MW, 6.6 MW
77.04307 51.1 deg 197.592 deg Southern East Pacific Rise 2010/03/07 07:05:23 GMT (-16.2, -115.3) 10 km 5.8 MB, 5.7 MS, 6.3 MW, 6.2 MW
76.72301 72.7 deg 154.87 deg Near Coast Of Central Chile 2010/03/11 14:55:27 GMT (-34.3, -71.8) 18 km 6.5 MB, 6.7 MW
75.94023 84.1 deg 247.802 deg Tonga Islands 2010/07/25 03:39:17 GMT (-15.1, -173.5) 7.0 km 5.6 MB, 5.7 MS, 5.9 MW, 5.9 MW
75.667625 86.4 deg 320.924 deg Eastern Sea Of Japan 2010/03/30 01:02:53 GMT (43.3, 138.4) 21 km 6.1 MB, 5.3 MS, 5.7 MW, 5.6 MW
74.62326 63.5 deg 353.832 deg East Of Severnaya Zemlya 2009/10/07 20:52:13 GMT (81.6, 119.5) 8.0 km 5.7 MB, 5.1 MS, 5.8 MW, 5.8 MW
73.277435 83.8 deg 246.612 deg Samoa Islands Region 2009/09/29 23:45:03 GMT (-15.8, -172.6) 10 km 6.0 MB, 5.8 MS
73.110435 76.3 deg 166.878 deg West Chile Rise 2009/06/10 23:13:21 GMT (-41.7, -84.0) 10 km 5.7 MB, 5.2 MS, 5.7 MW, 5.6 MW
73.00076 57.1 deg 313.507 deg Andreanof Islands, Aleutian Is. 2009/03/30 12:11:54 GMT (51.5, -178.3) 31 km 6.0 MB, 5.8 MW, 5.7 MW
72.79815 54.8 deg 148.506 deg Near Coast Of Peru 2009/05/18 14:01:04 GMT (-15.7, -74.8) 23 km 5.5 MS, 5.3 MB, 5.8 MW, 5.8 MW
71.55954 75.0 deg 157.362 deg Near Coast Of Central Chile 2010/08/05 06:01:47 GMT (-37.4, -73.3) 18 km 5.5 MS, 5.4 MB, 5.9 MW, 5.8 MW
71.54064 51.5 deg 313.731 deg Fox Islands, Aleutian Islands 2010/07/28 11:31:46 GMT (52.7, -169.4) 10 km 5.6 MW, 5.2 MS, 5.2 MB, 5.1 ML
71.38263 89.0 deg 250.397 deg Fiji Islands Region 2010/09/07 16:13:32 GMT (-15.9, -179.3) 10 km 5.7 MB, 6.0 MS, 6.3 MW, 6.2 MW
71.36862 75.5 deg 157.605 deg Near Coast Of Central Chile 2010/03/07 15:59:44 GMT (-38.0, -73.3) 27 km 5.5 MB, 5.6 MS, 5.8 MW, 5.8 MW
70.01567 95.3 deg 161.849 deg Drake Passage 2010/01/17 12:00:01 GMT (-57.7, -65.9) 5.0 km 6.0 MB, 6.0 MS, 6.3 MW, 6.3 MW
68.63332 53.0 deg 68.325 deg Northern Mid-Atlantic Ridge 2010/05/25 10:09:05 GMT (35.3, -35.9) 10 km 5.5 MB, 5.5 MS, 6.3 MW, 6.3 MW
68.5604 75.2 deg 157.549 deg Near Coast Of Central Chile 2010/10/23 05:58:27 GMT (-37.7, -73.4) 15 km 5.7 MB, 5.1 MS, 5.5 MW, 5.5 MW
68.29103 51.5 deg 313.709 deg Fox Islands, Aleutian Islands 2010/07/19 08:20:30 GMT (52.7, -169.3) 10 km 5.6 MW, 5.2 MS, 5.4 MB, 5.1 ML
68.04857 60.2 deg 146.358 deg Near Coast Of Northern Chile 2009/04/17 02:08:08 GMT (-19.6, -70.5) 25 km 5.8 MB, 5.8 MS, 6.1 MW, 6.1 MW
67.97773 72.6 deg 154.923 deg Near Coast Of Central Chile 2010/03/12 16:50:01 GMT (-34.2, -71.9) 7.0 km 6.1 MB, 5.4 MS, 5.8 MW, 5.7 MW
67.35519 68.8 deg 320.754 deg Near East Coast Of Kamchatka 2010/08/15 02:10:38 GMT (53.6, 160.1) 40 km 5.5 MB, 4.9 MS, 5.5 MW, 5.4 MW
67.076126 88.8 deg 243.105 deg Tonga Islands 2009/08/13 11:17:01 GMT (-21.7, -174.6) 10 km 5.6 MW, 5.3 MB
66.87142 85.1 deg 246.362 deg Tonga Islands 2009/05/17 06:23:03 GMT (-16.8, -173.5) 67 km 5.5 MB, 5.6 MW, 5.6 MW
66.637276 73.6 deg 319.012 deg Kuril Islands 2010/07/25 12:57:01 GMT (49.7, 154.6) 130 km 5.7 MB, 5.6 MW, 5.6 MW
66.44077 73.2 deg 152.204 deg Mendoza Province, Argentina 2010/02/12 12:03:38 GMT (-33.6, -68.8) 148 km 5.6 MB, 5.8 MW, 5.8 MW
66.42307 89.8 deg 243.409 deg Tonga Islands Region 2011/01/31 06:03:27 GMT (-22.0, -175.6) 76 km 6.0 MB, 6.0 MW, 6.0 MW
66.20879 63.7 deg 144.534 deg Chile-Bolivia Border Region 2009/07/14 18:38:08 GMT (-21.8, -67.1) 176 km 5.7 MW, 5.4 MB, 5.7 MW
65.557465 83.3 deg 246.821 deg Samoa Islands Region 2009/10/19 22:49:38 GMT (-15.4, -172.3) 18 km 6.2 MB, 5.7 MS, 6.0 MW, 5.9 MW
65.41359 57.1 deg 313.516 deg Andreanof Islands, Aleutian Is. 2009/03/30 12:07:28 GMT (51.5, -178.3) 31 km 6.0 MB, 5.5 MS, 5.7 MW, 5.7 MW
64.968605 85.6 deg 317.78 deg Hokkaido, Japan Region 2010/09/13 05:47:48 GMT (41.5, 142.0) 61 km 5.8 MB, 5.8 MW, 5.8 MW
64.916794 33.0 deg 109.614 deg Mona Passage 2010/11/13 04:35:39 GMT (17.9, -68.5) 95 km 5.6 MB, 5.4 MW, 5.6 MW
64.68453 71.3 deg 150.935 deg San Juan Province, Argentina 2010/01/18 12:28:34 GMT (-31.4, -68.6) 94 km 5.5 MB, 5.4 MW, 5.4 MW
63.5951 69.1 deg 147.579 deg Catamarca Province, Argentina 2009/08/12 18:00:52 GMT (-27.9, -66.7) 174 km 5.5 MW, 5.3 MB, 5.5 MW
62.48128 87.2 deg 315.592 deg Near East Coast Of Honshu, Japan 2009/06/23 07:37:17 GMT (38.8, 142.4) 37 km 5.7 MB, 5.0 MS, 5.6 MW, 5.6 MW
62.036465 87.4 deg 243.71 deg Tonga Islands 2010/10/19 20:39:36 GMT (-20.3, -173.8) 10 km 5.6 MB, 5.1 MS, 5.2 MW
61.051914 45.9 deg 150.946 deg Off Coast Of Northern Peru 2010/07/04 06:57:44 GMT (-8.5, -80.5) 29 km 5.7 MW, 5.3 MB, 5.6 MW
60.86632 65.7 deg 145.584 deg Salta Province, Argentina 2010/07/26 17:31:31 GMT (-24.1, -66.8) 193 km 5.6 MW, 5.3 MB, 5.5 MW
60.544907 74.2 deg 157.073 deg Near Coast Of Central Chile 2010/03/03 17:44:25 GMT (-36.6, -73.4) 20 km 5.6 MB, 5.9 MS, 6.1 MW, 6.1 MW
59.65578 74.0 deg 156.811 deg Near Coast Of Central Chile 2010/03/21 18:31:04 GMT (-36.3, -73.2) 36 km 5.6 MB, 5.1 MS, 5.5 MW, 5.5 MW
59.542225 90.3 deg 313.872 deg Near East Coast Of Honshu, Japan 2009/06/06 05:52:43 GMT (35.5, 140.9) 34 km 5.8 MB, 5.4 MS, 5.8 MW, 5.7 MW
59.483517 65.2 deg 145.091 deg Jujuy Province, Argentina 2010/01/28 08:04:14 GMT (-23.4, -66.7) 208 km 5.8 MB, 5.9 MW, 5.9 MW
59.444813 87.6 deg 243.814 deg Tonga Islands 2010/10/12 12:02:55 GMT (-20.4, -174.1) 12 km 5.9 MB, 5.8 MS, 5.9 MW, 5.8 MW
59.29928 80.7 deg 317.185 deg Kuril Islands 2010/03/06 13:31:12 GMT (44.2, 147.6) 53 km 5.7 MW, 5.1 MS, 5.4 MB, 5.6 MW
57.36869 57.1 deg 313.207 deg Andreanof Islands, Aleutian Is. 2009/06/22 19:55:24 GMT (51.3, -178.2) 35 km 5.6 MB, 5.6 MW, 5.6 MW
56.99895 63.7 deg 190.355 deg Easter Island Region 2009/09/10 19:46:03 GMT (-29.9, -111.8) 10 km 5.5 MW, 5.4 MB
56.955807 84.4 deg 247.222 deg Tonga Islands 2009/05/13 21:31:17 GMT (-15.8, -173.5) 85 km 5.8 MW, 5.3 MB, 5.8 MW
55.97463 83.6 deg 245.857 deg Samoa Islands Region 2009/10/17 10:45:26 GMT (-16.4, -172.0) 10 km 5.7 MB, 5.3 MS, 5.7 MW, 5.7 MW
55.690002 91.5 deg 246.126 deg Fiji Islands Region 2010/08/16 19:35:49 GMT (-20.8, -178.8) 603 km 5.7 MB, 6.2 MW, 6.1 MW
54.343197 64.9 deg 148.57 deg Northern Chile 2010/07/17 06:07:42 GMT (-24.7, -69.8) 49 km 5.7 MB, 5.5 MW, 5.5 MW
53.821655 71.4 deg 152.139 deg Mendoza Province, Argentina 2009/05/08 13:44:53 GMT (-32.1, -69.7) 112 km 5.6 MB, 5.4 MW
53.4494 87.0 deg 314.279 deg Off East Coast Of Honshu, Japan 2010/01/17 06:04:36 GMT (37.9, 143.6) 7.0 km 5.7 MB, 5.2 MS, 5.6 MW, 5.6 MW
52.00837 85.0 deg 247.268 deg Tonga Islands 2010/09/16 01:54:40 GMT (-16.0, -174.0) 84 km 5.5 MB, 5.8 MW, 5.8 MW
51.943222 90.8 deg 324.502 deg E. Russia-N.E. China Border Reg. 2010/02/18 01:13:19 GMT (42.6, 130.7) 578 km 6.3 MB, 6.9 MW, 6.9 MW
51.875526 92.1 deg 310.243 deg Southeast Of Honshu, Japan 2011/01/05 00:57:32 GMT (31.5, 142.2) 21 km 6.0 MB, 5.4 MS, 5.6 MW
51.274254 63.6 deg 319.191 deg Komandorskiye Ostrova Region 2010/12/07 18:17:39 GMT (54.4, 169.1) 10 km 6.1 MB, 5.5 MS, 5.8 MW, 5.8 MW
50.02753 94.2 deg 241.6 deg South Of Fiji Islands 2009/08/18 21:20:47 GMT (-26.1, -178.4) 270 km 5.5 MB, 6.3 MW, 6.3 MW
49.885563 95.1 deg 238.784 deg Kermadec Islands Region 2009/04/18 02:03:52 GMT (-28.9, -177.4) 65 km 6.0 MB, 5.8 MW, 5.7 MW
49.306564 57.1 deg 313.295 deg Andreanof Islands, Aleutian Is. 2009/06/22 21:05:33 GMT (51.3, -178.2) 29 km 5.5 MB, 5.0 MS, 5.4 MW, 5.4 MW
48.80001 83.2 deg 246.518 deg Samoa Islands Region 2009/09/29 18:08:21 GMT (-15.6, -172.0) 10 km 5.6 MB
47.74302 62.3 deg 145.139 deg Chile-Bolivia Border Region 2010/10/22 19:31:37 GMT (-20.9, -68.4) 132 km 5.8 MW, 5.4 MB, 5.8 MW
47.65089 59.2 deg 314.902 deg Rat Islands, Aleutian Islands 2009/10/07 05:38:37 GMT (52.2, 178.1) 138 km 5.6 MB, 5.6 MW, 5.6 MW
42.804577 57.3 deg 313.322 deg Andreanof Islands, Aleutian Is. 2010/08/08 12:04:28 GMT (51.3, -178.6) 29 km 5.7 MB, 5.0 MS, 5.4 MW, 5.8 ML
40.07594 67.2 deg 146.338 deg Salta Province, Argentina 2010/03/08 17:03:16 GMT (-25.7, -66.6) 10 km 5.6 MB, 5.5 MS, 5.8 MW
38.362114 84.8 deg 246.743 deg Tonga Islands 2009/10/02 01:07:39 GMT (-16.3, -173.5) 8.0 km 6.1 MB, 6.0 MS, 6.1 MW, 6.1 MW
31.765995 96.3 deg 297.955 deg Mariana Islands Region 2010/08/22 09:33:06 GMT (19.4, 147.4) 23 km 5.9 MB, 5.3 MS, 5.5 MW
30.577707 94.3 deg 306.237 deg Bonin Islands, Japan Region 2010/12/21 17:41:25 GMT (27.1, 143.3) 7.6 km 5.5 MB