Polarization anomalies at various stations


The table below shows the results from polarization analysis of long-period surface waves using the method described by Ekstrom and Busby (SRL, 2008). The horizontal components have been rotated to maximize the correlation between the observed and predicted seismograms for moderate and large earthquakes. The table shows the median (aqua blue) of the rotation angle (the anomaly), as well as the range (navy blue) for the second and third quartiles of the distribution of angles.

The table below gives the channel names and station orientation for the horizontal components, the wave type (Surface-wave or Mantle-wave), a response epoch identifier, the times of the first and last observations used, the total number of observations, and the number of polarization measurements used in the estimate of the sensor orientation. Estimates based on fewer than 5 measurements are less reliable. The orientation anomaly is measured against the reported orientation (Az-1, Az-2). A positive value for the anomaly reflects a counter-clockwise rotation of the sensor compared to the reported value.

Ranked by polarization anomaly

Ascii file with the data

Arrival-angle anomalies
Station Channels T Epoch min time max time Az-1 Az-2 # obs. # used -90- -26 -25- -21 -20- -16 -15- -11 -10- -8 -7- -5 -4- -2 -1- 1 2- 4 5- 7 8- 10 11- 15 16- 20 21- 25 26- 90
APE-GE LHN LHE M 0001 2000.355 2006.319 0.0 90.0 227 18 x x x x x -5 x x x x x x x x x
APEZ-GE LHN LHE M 0001 2000.114 2003.361 0.0 90.0 139 2 x x x x x x x -1 x x x x x x x
BGIO-GE LHN LHE M 0001 1994.130 1996.082 0.0 90.0 87 29 x x x x x x x x 4 x x x x x x
BOA-GE LHN LHE M 0001 2000.056 2003.010 0.0 90.0 63 3 x x x x x x x x x x x 14 x x x
BOAB-GE LHN LHE M 0002 2007.164 2007.232 0.0 90.0 13 0 x x x x x x x x x x x x x x x
BOAB-GE LHN LHE M 0003 2008.015 2015.149 0.0 90.0 184 0 x x x x x x x x x x x x x x x
CART-GE LHN LHE M 0001 1997.351 1999.166 0.0 90.0 54 4 x x x x x x x x 4 x x x x x x
CART-GE LHN LHE M 0002 1999.192 2006.319 0.0 90.0 272 20 x x x x x x -2 x x x x x x x x
CSS-GE LHN LHE M 0001 1998.361 1999.166 0.0 90.0 16 0 x x x x x x x x x x x x x x x
CSS-GE LHN LHE M 0002 1999.263 2006.319 0.0 90.0 285 31 x x x x x x x 0 x x x x x x x
DAG-GE LHN LHE M 0001 1998.246 1999.192 0.0 90.0 25 0 x x x x x x x x x x x x x x x
DAG-GE LHN LHE M 0002 1999.263 2015.149 0.0 90.0 461 26 x x x x x x x x 4 x x x x x x
DAMY-GE LHN LHE M 0001 2012.312 2015.042 0.0 90.0 104 0 x x x x x x x x x x x x x x x
DSB-GE LHN LHE M 0001 1993.363 1999.192 0.0 90.0 201 33 x x x x x x x -1 x x x x x x x
DSB-GE LHN LHE M 0002 1999.263 2006.319 0.0 90.0 267 25 x x x x x x x x 4 x x x x x x
EIL-GE LHN LHE M 0001 1997.035 1999.192 0.0 90.0 85 7 x x x x x x x x 2 x x x x x x
EIL-GE LHN LHE M 0002 1999.263 2005.205 0.0 90.0 209 19 x x x x x x x 0 x x x x x x x
EIL-GE LHN LHE M 0004 2006.033 2007.354 0.0 90.0 74 4 x x x x x x -2 x x x x x x x x
EIL-GE LHN LHE M 0006 2008.144 2015.149 0.0 90.0 333 99 x x x x x x -3 x x x x x x x x
FODE-GE LHN LHE M 0001 2000.114 2003.208 0.0 90.0 111 3 x x x x x x -2 x x x x x x x x
GVD-GE LHN LHE M 0001 1999.312 2000.088 0.0 90.0 17 0 x x x x x x x x x x x x x x x
GVD-GE LHN LHE M 0002 2000.114 2003.233 0.0 90.0 114 0 x x x x x x x x x x x x x x x
GVD-GE LHN LHE M 0003 2003.264 2006.319 0.0 90.0 117 0 x x x x x x x x x x x x x x x
HLG-GE LHN LHE M 0001 2001.352 2002.168 0.0 90.0 15 0 x x x x x x x x x x x x x x x
HLG-GE LHN LHE M 0002 2002.173 2006.319 0.0 90.0 180 14 x x x x x x -2 x x x x x x x x
IBBN-GE LHN LHE M 0001 1999.289 2005.228 0.0 90.0 229 12 x x x x x -5 x x x x x x x x x
IBBN-GE LHN LHE M 0002 2005.269 2006.319 0.0 90.0 42 2 x x x x x x x -1 x x x x x x x
ISP-GE LHN LHE M 0001 1996.310 1999.166 0.0 90.0 76 13 x x x x x x x x 3 x x x x x x
ISP-GE LHN LHE M 0002 1999.263 2006.319 0.0 90.0 257 40 x x x x x x x x x 6 x x x x x
JER-GE LHN LHE M 0001 1996.154 1996.198 0.0 90.0 12 4 x x x x x x x x x 7 x x x x x
JER-GE LHN LHE M 0002 1996.292 1998.333 0.0 90.0 77 10 x x x x x x x x x x 9 x x x x
JER-GE LHN LHE M 0004 1999.019 1999.103 0.0 90.0 12 1 x x x x x x x -1 x x x x x x x
JER-GE LHN LHE M 0005 1999.130 2003.174 0.0 90.0 114 11 x x x x x x x 1 x x x x x x x
KBS-GE LHN LHE M 0001 1994.318 1999.098 0.0 90.0 168 42 x x x x x x x x 3 x x x x x x
KBS-GE LHN-00 LHE-00 M 0001 1999.130 2006.319 0.0 90.0 254 68 x x x x x x x 1 x x x x x x x
KBS-GE LHN-10 LHE-10 M 0001 1999.130 2006.319 0.0 90.0 248 9 x x x x x -7 x x x x x x x x x
KMBO-GE LHN LHE M 0001 1995.260 1999.136 0.0 90.0 112 8 x x x x x x -3 x x x x x x x x
KMBO-GE LHN-00 LHE-00 M 0001 1999.166 2001.055 0.0 90.0 38 1 x x x -15 x x x x x x x x x x x
KMBO-GE LHN-00 LHE-00 M 0002 2001.059 2003.050 0.0 90.0 26 2 x x x x x -6 x x x x x x x x x
KMBO-GE LHN-00 LHE-00 M 0003 2003.070 2006.319 0.0 90.0 127 5 x x x x x x -2 x x x x x x x x
KMBO-GE LHN-10 LHE-10 M 0001 1999.166 2001.055 0.0 90.0 36 1 x x x x -9 x x x x x x x x x x
KMBO-GE LHN-10 LHE-10 M 0002 2001.059 2003.050 0.0 90.0 22 2 x x x x x -5 x x x x x x x x x
KMBO-GE LHN-10 LHE-10 M 0003 2003.070 2006.319 0.0 90.0 98 5 x x x -12 x x x x x x x x x x x
KRIS-GE LHN LHE M 0001 1998.235 2004.124 0.0 90.0 174 2 x x x x x x -3 x x x x x x x x
KSDI-GE LHN LHE M 0001 2002.036 2006.319 0.0 90.0 181 11 x x x x x x x 0 x x x x x x x
KWP-GE LHN LHE M 0001 1999.192 2006.319 0.0 90.0 291 13 x x x -12 x x x x x x x x x x x
LAST-GE LHN LHE M 0001 2004.197 2006.293 0.0 90.0 94 6 x x x -15 x x x x x x x x x x x
LID-GE LHN LHE M 0001 1995.143 1995.294 0.0 90.0 23 2 x x x x -8 x x x x x x x x x x
LVC-GE LHN LHE M 0001 1997.023 1998.313 0.0 90.0 12 3 x x x x x x x 1 x x x x x x x
LVC-GE LHN-00 LHE-00 M 0001 1999.363 2001.109 0.0 90.0 8 1 x x x x x x x -1 x x x x x x x
LVC-GE LHN-00 LHE-00 M 0002 2001.145 2003.304 0.0 90.0 57 14 x x x x x x x x 2 x x x x x x
LVC-GE LHN-10 LHE-10 M 0001 1999.363 2001.109 0.0 90.0 8 1 x x x x x -7 x x x x x x x x x
LVC-GE LHN-10 LHE-10 M 0002 2001.145 2003.304 0.0 90.0 58 7 x x x x x x x -1 x x x x x x x
MAHO-GE LHN LHE M 0001 1999.166 2001.026 0.0 90.0 42 7 x x x x x x x x x 5 x x x x x
MAHO-GE LHN LHE M 0002 2001.055 2006.319 0.0 90.0 164 14 x x x x x x x x x x 8 x x x x
MALT-GE LHN LHE M 0001 2000.156 2006.319 0.0 90.0 224 25 x x x x x x -4 x x x x x x x x
MAUI-GE LHN LHE M 0001 1999.192 2000.008 0.0 90.0 11 0 x x x x x x x x x x x x x x x
MAUI-GE LHN LHE M 0002 2000.088 2008.080 0.0 90.0 265 9 x x -18 x x x x x x x x x x x x
MELI-GE LHN LHE M 0001 1999.363 2004.028 0.0 90.0 153 8 x x x x x -6 x x x x x x x x x
MELI-GE LHN LHE M 0002 2004.036 2006.319 0.0 90.0 108 1 x x x -14 x x x x x x x x x x x
MHV-GE LHN LHE M 0001 1995.134 1999.166 0.0 90.0 167 35 x x x x x x x 1 x x x x x x x
MHV-GE LHN LHE M 0002 1999.192 2003.361 0.0 90.0 143 38 x x x x x x x 0 x x x x x x x
MLR-GE LHN LHE M 0001 1994.282 1999.192 0.0 90.0 168 11 x x x x x x x 1 x x x x x x x
MLR-GE LHN LHE M 0002 1999.263 2003.281 0.0 90.0 139 11 x x x x x x x x x 5 x x x x x
MORC-GE LHN LHE M 0001 1993.343 1999.289 0.0 90.0 225 23 x x x x x x x -1 x x x x x x x
MORC-GE LHN LHE M 0002 1999.340 2006.319 0.0 90.0 276 45 x x x x x x x 0 x x x x x x x
MRNI-GE LHN LHE M 0001 1998.246 1999.192 0.0 90.0 18 0 x x x x x x x x x x x x x x x
MRNI-GE LHN LHE M 0002 1999.263 2002.010 0.0 90.0 64 6 x x x x x x x x 2 x x x x x x
MTE-GE LHN LHE M 0001 1997.287 1999.137 0.0 90.0 53 6 x x x x x x x -1 x x x x x x x
MTE-GE LHN LHE M 0002 1999.166 2006.293 0.0 90.0 283 47 x x x x x x -4 x x x x x x x x
NAI-GE LHN LHE M 0001 1995.097 1995.257 0.0 90.0 33 5 x x x x x x -3 x x x x x x x x
PMG-GE LHN LHE M 0001 1993.253 1999.130 0.0 90.0 198 26 x x x x x x -2 x x x x x x x x
PMG-GE LHN-00 LHE-00 M 0001 1999.136 2002.256 0.0 90.0 115 43 x x x x x x x 0 x x x x x x x
PMG-GE LHN-00 LHE-00 M 0002 2002.306 2003.158 0.0 90.0 21 10 x x x x x x x 0 x x x x x x x
PMG-GE LHN-00 LHE-00 M 0003 2003.166 2003.361 0.0 90.0 31 7 x x x x x x x 1 x x x x x x x
PMG-GE LHN-10 LHE-10 M 0001 2003.166 2003.361 0.0 90.0 31 6 x x x x x x x -1 x x x x x x x
PSZ-GE LHN LHE M 0001 1996.345 1999.192 0.0 90.0 53 7 x x x x x x x -1 x x x x x x x
PSZ-GE LHN LHE M 0002 1999.340 2001.188 0.0 90.0 53 9 x x x x x x x 0 x x x x x x x
PSZ-GE LHN LHE M 0003 2001.285 2002.168 0.0 90.0 21 5 x x x x x x x 0 x x x x x x x
PSZ-GE LHN LHE M 0004 2002.173 2006.319 0.0 90.0 185 36 x x x x x x x x 4 x x x x x x
PUL-GE LHN LHE M 0001 1998.190 1999.319 0.0 90.0 30 1 x x x x x x x x 3 x x x x x x
PUL-GE LHN LHE M 0002 1999.321 2003.361 0.0 90.0 153 9 x x x x x x x 1 x x x x x x x
RGN-GE LHN LHE M 0001 1995.336 1999.137 0.0 90.0 133 17 x x x x -10 x x x x x x x x x x
RGN-GE LHN LHE M 0002 1999.166 2006.319 0.0 90.0 286 40 x x x -11 x x x x x x x x x x x
RIOB-GE LHN LHE M 0001 2002.346 2003.361 0.0 90.0 24 2 x x x x x -7 x x x x x x x x x
RUE-GE LHN LHE M 0002 2000.037 2006.319 0.0 90.0 267 32 x x x x x -6 x x x x x x x x x
SANT-GE LHN LHE M 0001 1998.073 1999.192 0.0 90.0 42 2 x x x x x x x x 2 x x x x x x
SANT-GE LHN LHE M 0002 2000.028 2006.319 0.0 90.0 266 3 x x x x -8 x x x x x x x x x x
SELV-GE LHN LHE M 0001 2002.002 2003.270 0.0 90.0 50 1 x x x x x x -2 x x x x x x x x
SFJ-GE LHN LHE M 0001 1996.082 1999.037 0.0 90.0 85 2 x x x x x x x x x 5 x x x x x
SFJ-GE LHN-00 LHE-00 M 0001 1999.063 2002.116 0.0 90.0 95 6 x x x x x x x -1 x x x x x x x
SFJ-GE LHN-00 LHE-00 M 0002 2002.164 2003.361 0.0 90.0 63 3 x x x x x -6 x x x x x x x x x
SFS-GE LHN LHE M 0001 2001.318 2001.318 0.0 90.0 1 0 x x x x x x x x x x x x x x x
SFS-GE LHN LHE M 0002 2001.346 2006.319 0.0 90.0 198 10 x x x x x x x x x x x x x x x
SFUC-GE LHN LHE M 0001 1996.197 1999.166 0.0 90.0 110 10 x x x x x x x x 4 x x x x x x
SFUC-GE LHN LHE M 0002 1999.192 2001.285 0.0 90.0 78 10 x x x x x x x x 3 x x x x x x
SKD-GE LHN LHE M 0001 1998.047 1999.192 0.0 90.0 39 0 x x x x x x x x x x x x x x x
SKD-GE LHN LHE M 0002 1999.268 2000.088 0.0 90.0 20 1 x x -19 x x x x x x x x x x x x
SKD-GE LHN LHE M 0003 2000.114 2000.280 0.0 90.0 19 1 x x x x x x x x x 5 x x x x x
SKD-GE LHN LHE M 0004 2000.299 2004.289 0.0 90.0 139 5 x x x x -9 x x x x x x x x x x
SNAA-GE LHN LHE M 0001 1997.070 1999.273 0.0 90.0 69 2 x x x x x x x -1 x x x x x x x
SNAA-GE LHN LHE M 0002 1999.289 2003.004 0.0 90.0 104 6 x x x x x x x 0 x x x x x x x
SNAA-GE LHN LHE M 0003 2003.010 2015.149 0.0 90.0 539 17 x x x x x x x x 4 x x x x x x
STU-GE LHN LHE M 0001 1994.130 1996.337 0.0 90.0 111 33 x x x x x x -2 x x x x x x x x
STU-GE LHN LHE M 0002 1996.345 1998.093 0.0 90.0 54 1 x x x x x x x -1 x x x x x x x
STU-GE LHN LHE M 0003 1998.123 1999.363 0.0 90.0 52 7 x x x x x x x 0 x x x x x x x
STU-GE LHN LHE M 0004 2000.008 2006.319 0.0 90.0 273 49 x x x x x x x -1 x x x x x x x
SUMG-GE LHN LHE M 0001 2002.164 2007.094 0.0 90.0 124 10 x x x x x x x x 4 x x x x x x
SUMG-GE LHN LHE M 0002 2007.164 2007.343 0.0 90.0 38 3 x x x x x -5 x x x x x x x x x
SUMG-GE LHN LHE M 0003 2007.350 2010.195 0.0 90.0 118 6 x x x x x -5 x x x x x x x x x
SUMG-GE LHN LHE M 0004 2010.204 2012.149 0.0 90.0 92 6 x x x x x x x 0 x x x x x x x
SUMG-GE LHN LHE M 0005 2012.208 2013.202 0.0 90.0 53 8 x x x x x -5 x x x x x x x x x
SUMG-GE LHN LHE M 0006 2013.225 2015.149 0.0 90.0 98 21 x x x x x x x x x 6 x x x x x
SUW-GE LHN LHE M 0001 1995.312 1999.192 0.0 90.0 145 13 x x x x x -5 x x x x x x x x x
SUW-GE LHN LHE M 0002 1999.263 2010.147 0.0 90.0 457 44 x x x x -8 x x x x x x x x x x
TIRR-GE LHN LHE M 0001 2003.304 2015.149 0.0 90.0 544 74 x x x x x x x -1 x x x x x x x
TRTE-GE LHN LHE M 0001 1996.197 1999.192 0.0 90.0 109 3 x x x x -8 x x x x x x x x x x
TRTE-GE LHN LHE M 0002 1999.263 2003.107 0.0 90.0 126 4 x x x x x x -4 x x x x x x x x
UGM-GE LHN LHE M 0001 1996.249 1999.166 0.0 90.0 27 3 x x x x x x x 1 x x x x x x x
UGM-GE LHN LHE M 0002 1999.363 2003.361 0.0 90.0 115 43 x x x x x x x x 2 x x x x x x
UGM-GE LHN LHE M 0004 2007.013 2015.149 0.0 90.0 405 81 x x x x x x -4 x x x x x x x x
VSU-GE LHN LHE M 0001 2003.124 2015.149 0.0 90.0 584 26 x x x x -9 x x x x x x x x x x
WLF-GE LHN LHE M 0001 1994.090 1999.345 0.0 90.0 221 34 x x x x x x x 1 x x x x x x x
WLF-GE LHN LHE M 0002 1999.363 2006.319 0.0 90.0 273 28 x x x x x x x x 2 x x x x x x
ZKR-GE LHN LHE M 0002 2003.264 2006.319 90.0 90.0 127 2 x x x x x x x x x x x x x x x