Station XA SA20 - XA.SA20

Network: XA97 - Anatomy of an Archean Craton, South Africa

Nearby stations (2 deg radius)

Station Name (Lat, Lon) Start / End Elevation
SA20 XA.SA20 (-29.02, 26.20) 1998-04-05 / 1999-12-31 1400 m
Crust2 Type:G1,Archean, no seds.
Thickness Estimate:34 km
Thickness StdDev:0.3 km
Vp/Vs Estimate:1.80
Vp/Vs StdDev:0.02
Vs Estimate:3.594 km/s
Poisson's Ratio:0.28
Peak Value:0.08
Assumed Vp:6.459 km/s
Ps Weight:0.33333334
PpPs Weight:0.33333334
PsPs Weight:0.33333328
Residual Complexity:0.359
Nearby stations H: +-
(2.0 deg) Vp/Vs: +-

2 with match > 90% ( 13.333333 %) and 4 with match > 80% ( 26.666666 %) out of 15.

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 34 km 1.80 6.459 km/s 3.594 km/s 0.28
Crust2.0 37 km 1.76 6.459 km/s 3.665 km/s 0.26 G1,Archean, no seds.
Global Maxima 34 km 1.80 6.459 km/s 3.594 km/s 0.28 amp=0.07642179
Local Maxima 1 34 km 1.73 6.459 km/s 3.739 km/s 0.25 amp=0.030876266
Local Maxima 2 37 km 1.71 6.459 km/s 3.772 km/s 0.24 amp=0.01796193
Local Maxima 3 32 km 1.98 6.459 km/s 3.258 km/s 0.33 amp=0.017040975
Local Maxima 4 46 km 1.60 6.459 km/s 4.037 km/s 0.18 amp=0.0108054755
Predicted Arrivals for vertical incidence
(zero ray parameter)
Ps4.26 SECOND
PpPs14.94 SECOND
PsPs/PpSs19.20 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

(4 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude
93.4791 77.9 deg 44.966 deg Western Xizang-India Border Reg. 1999/03/28 19:05:11 GMT (30.5, 79.4) 15 km 6.4 MB, 6.6 MS, 6.6 MW, 6.5 ME
92.50738 82.5 deg 240.622 deg Near Coast Of Central Chile 1998/09/03 17:37:58 GMT (-29.5, -71.7) 27 km 6.2 MB, 6.6 MS, 6.5 UNKNOWN, 6.4 ME
85.92866 42.6 deg 98.521 deg Mid-Indian Ridge 1999/01/24 08:00:08 GMT (-26.5, 74.5) 10 km 6.0 MB, 6.3 MS, 6.3 MW, 6.3 ME
80.23195 37.1 deg 245.583 deg Southern Mid-Atlantic Ridge 1998/06/24 10:44:30 GMT (-37.3, -17.4) 10 km 5.7 MB, 5.8 MS, 6.0 UNKNOWN, 5.9 MW

Losers

(11 events)
Radial Match Distance Baz FERegion Time Lat/Lon Depth Magnitude Reason
74.95287 46.0 deg 219.032 deg South Sandwich Islands Region 1998/08/29 08:30:21 GMT (-55.7, -27.0) 33 km 5.6 MB, 5.6 MS, 6.0 UNKNOWN, 5.9 MW
71.58528 41.2 deg 286.53 deg Ascension Island Region 1998/06/18 04:17:54 GMT (-11.6, -13.9) 10 km 6.1 MS, 5.4 MB, 6.2 UNKNOWN
67.94927 73.9 deg 75.959 deg Northern Sumatra, Indonesia 1999/02/04 19:28:00 GMT (4.0, 95.3) 56 km 5.8 MB, 5.4 MS, 5.9 MW, 5.9 MW
62.62354 77.8 deg 233.07 deg S. Chile-Argentina Border Region 1998/12/14 16:25:24 GMT (-38.2, -71.0) 138 km 6.0 UNKNOWN, 4.8 MS, 5.4 MB
58.344788 88.7 deg 252.358 deg Southern Peru 1998/10/08 04:51:42 GMT (-16.1, -71.4) 136 km 6.1 MB, 6.4 UNKNOWN, 6.2 MW
57.94218 83.2 deg 247.947 deg Northern Chile 1999/03/02 17:45:55 GMT (-22.7, -68.5) 111 km 5.8 MB, 6.1 MW, 5.9 MW
55.23615 62.9 deg 78.848 deg South Indian Ocean 1999/03/29 06:17:58 GMT (-4.0, 87.3) 10 km 5.5 MS, 5.4 MB, 5.8 MW, 5.8 MW
51.014038 77.6 deg 35.553 deg Afghanistan-Tajikistan Bord Reg. 1998/12/11 20:16:24 GMT (36.5, 71.0) 223 km 5.7 UNKNOWN, 5.0 MB, 5.6 MW
50.278286 93.9 deg 186.123 deg Pacific-Antarctic Ridge 1998/10/11 23:36:22 GMT (-56.9, -142.6) 10 km 5.2 MB, 5.7 MS, 6.3 UNKNOWN, 6.2 MW
49.80362 93.0 deg 92.112 deg Minahassa Peninsula, Sulawesi 1998/10/10 16:32:19 GMT (-0.4, 119.8) 33 km 5.7 MB, 5.6 MS, 6.0 UNKNOWN, 6.0 MW
28.973206 93.0 deg 92.105 deg Minahassa Peninsula, Sulawesi 1998/10/10 16:29:08 GMT (-0.4, 119.9) 33 km 5.5 MS, 5.4 MB, 6.1 UNKNOWN