# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Copyright (C) 2015-2019 GEM Foundation
#
# OpenQuake is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenQuake is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with OpenQuake. If not, see <http://www.gnu.org/licenses/>.
"""
Module exports :class:`TusaLanger2016RepiBA08SE`,
:class:`TusaLanger2016RepiBA08DE`,
:class:`TusaLanger2016RepiSP87SE`,
:class:`TusaLanger2016RepiSP87DE`,
:class:`TusaLanger2016Rhypo`
"""
import numpy as np
from scipy.constants import g
from openquake.hazardlib.gsim.base import GMPE, CoeffsTable
from openquake.hazardlib import const
from openquake.hazardlib.imt import PGA, SA
[docs]class TusaLanger2016RepiBA08SE(GMPE):
"""
Implements GMPE developed by Giuseppina Tusa and Horst Langer (2016) and
published as "Prediction of ground motion parameters for the volcanic area
of Mount Etna" Journal of Seismology, DOI 10.1007/s10950-015-9508-x.
GMPE derives from earthquakes in the volcanic area of Mt. Etna in the
magnitude range 3<ML<4.8 for epicentral distances <100 km, and for soil
classes A, B, and D. Authors do NOT derive coefficients for site class C
due to limited data. For implementation using hypocentral distance see
:class:`TusaLanger2016Rhypo`.
Two functional forms were considered by the authors: Sabetta and Pugliese,
1987 (SP87) and a simplified version of Boore and Atkinson, 2008 (BA08).
The GMPE distinguishes between shallow volcano-tectonic events related to
flank movements (SE, focal depths <5km) and deeper events occurring due to
regional tectonics (DE, focal depths >5km).
Test tables are generated from a spreadsheet provided by the authors, and
modified according to OQ format (e.g. conversion from cm/s2 to m/s2).
Jan 2019: After noticing an anomalous-looking spike in the response spectra
of the TusaLanger2016RepiBA08SE model at T=0.14s, we contacted the authors
who found a mistake in one of the coefficients in the publication. It has
been updated according to the authors suggestion.
"""
#: Supported tectonic region type is 'volcanic' because the
#: equations have been derived from data from Etna (Sicily, Italy)
DEFINED_FOR_TECTONIC_REGION_TYPE = const.TRT.VOLCANIC
#: Supported intensity measure types are PGA and SA
DEFINED_FOR_INTENSITY_MEASURE_TYPES = set([
PGA,
SA
])
#: Supported intensity measure component is the maximum of two horizontal
#: components
DEFINED_FOR_INTENSITY_MEASURE_COMPONENT = \
const.IMC.GREATER_OF_TWO_HORIZONTAL
#: Supported standard deviation type is total
DEFINED_FOR_STANDARD_DEVIATION_TYPES = set([const.StdDev.TOTAL])
#: Required site parameter is Vs30
REQUIRES_SITES_PARAMETERS = set(('vs30',))
#: Required rupture parameter is magnitude.
REQUIRES_RUPTURE_PARAMETERS = set(('mag',))
#: Required distance measure is Repi
REQUIRES_DISTANCES = set(('repi',))
[docs] def get_mean_and_stddevs(self, sites, rup, dists, imt, stddev_types):
"""
See :meth:`superclass method
<.base.GroundShakingIntensityModel.get_mean_and_stddevs>`
for spec of input and result values.
"""
# extracting dictionary of coefficients specific to required
# intensity measure type
C = self.COEFFS[imt]
imean = (self._compute_magnitude(rup, C) +
self._compute_distance(rup, dists, C) +
self._get_site_amplification(sites, C))
istddevs = self._get_stddevs(C,
stddev_types,
num_sites=sites.vs30.size)
# convert from log10 to ln and from cm/s**2 to g
mean = np.log((10.0 ** (imean - 2.0)) / g)
# Return stddevs in terms of natural log scaling
stddevs = np.log(10.0 ** np.array(istddevs))
return mean, stddevs
def _get_stddevs(self, C, stddev_types, num_sites):
"""
Return standard deviations as defined in tables below
"""
assert all(stddev_type in self.DEFINED_FOR_STANDARD_DEVIATION_TYPES
for stddev_type in stddev_types)
stddevs = [np.zeros(num_sites) + C['SigmaTot'] for _ in stddev_types]
return stddevs
def _compute_distance(self, rup, dists, C):
"""
Compute the distance function, equation (9):
"""
mref = 3.6
rref = 1.0
rval = np.sqrt(dists.repi ** 2 + C['h'] ** 2)
return (C['c1'] + C['c2'] * (rup.mag - mref)) *\
np.log10(rval / rref) + C['c3'] * (rval - rref)
def _compute_magnitude(self, rup, C):
"""
Compute the magnitude function, equation (9):
"""
return C['a'] + (C['b1'] * (rup.mag)) + (C['b2'] * (rup.mag) ** 2)
def _get_site_amplification(self, sites, C):
"""
Compute the site amplification function given by FS = eiSi, for
i = 1,2,3 where Si are the coefficients determined through regression
analysis, and ei are dummy variables (0 or 1) used to denote the
different EC8 site classes.
"""
ssa, ssb, ssd = self._get_site_type_dummy_variables(sites)
return (C['sA'] * ssa) + (C['sB'] * ssb) + (C['sD'] * ssd)
def _get_site_type_dummy_variables(self, sites):
"""
Get site type dummy variables, which classified the sites into
different site classes based on the shear wave velocity in the
upper 30 m (Vs30) according to the EC8 (CEN 2003):
class A: Vs30 > 800 m/s
class B: Vs30 = 360 - 800 m/s
class C*: Vs30 = 180 - 360 m/s
class D: Vs30 < 180 m/s
*Not computed by this GMPE
"""
ssa = np.zeros(len(sites.vs30))
ssb = np.zeros(len(sites.vs30))
ssd = np.zeros(len(sites.vs30))
# Class D; Vs30 < 180 m/s.
idx = (sites.vs30 < 180.0)
ssd[idx] = 1.0
# Class B; 360 m/s <= Vs30 <= 800 m/s.
idx = (sites.vs30 >= 360.0) & (sites.vs30 < 800.0)
ssb[idx] = 1.0
# Class A; Vs30 > 800 m/s.
idx = (sites.vs30 >= 800.0)
ssa[idx] = 1.0
for value in sites.vs30:
if 180 <= value < 360:
raise Exception(
'GMPE does not consider site class C (Vs30 = 180-360 m/s)')
return ssa, ssb, ssd
# Coefficients from Table 9 (PGA) and Table 12 (SA); sigma values in log
# Correction made to coeff b2 (0.14s) by Giuseppina Tusa in email (Jan 15, 2019)
COEFFS = CoeffsTable(sa_damping=5, table="""
IMT a b1 b2 c1 c2 h c3 sA sB sD SigmaIE SigmaIS SigmaTot
pga -0.568 0.475 0.037 -2.054 -0.015 2.317 0.006 0 0.452 0.477 0.222 0.221 0.390
10.0 -4.794 0.827 0.054 -1.273 0.096 2.221 -0.002 0 0.363 0.340 0.164 0.243 0.351
5.00 -4.010 0.646 0.083 -1.036 0.142 1.517 -0.003 0 0.296 0.241 0.163 0.263 0.363
3.33 -5.200 1.456 -0.015 -0.953 0.092 1.728 -0.006 0 0.281 0.246 0.168 0.263 0.369
2.50 -5.753 1.912 -0.069 -1.024 0.025 2.641 -0.006 0 0.343 0.353 0.158 0.255 0.359
2.00 -5.531 2.016 -0.089 -1.139 0.037 3.044 -0.005 0 0.375 0.367 0.157 0.250 0.355
1.67 -3.923 1.431 -0.023 -1.369 0.061 3.542 -0.003 0 0.403 0.384 0.150 0.238 0.342
1.43 -3.023 1.184 -0.011 -1.461 0.114 3.668 -0.001 0 0.438 0.385 0.142 0.243 0.342
1.25 -2.558 1.091 -0.014 -1.468 0.142 3.565 -0.001 0 0.433 0.379 0.131 0.246 0.341
1.11 -1.921 0.847 0.011 -1.523 0.157 3.580 0.000 0 0.450 0.397 0.126 0.256 0.346
1.00 -1.358 0.629 0.030 -1.522 0.191 3.356 0.000 0 0.465 0.416 0.124 0.263 0.353
0.67 -1.348 0.824 -0.012 -1.631 0.152 3.229 0.003 0 0.532 0.510 0.128 0.247 0.339
0.50 -2.278 1.574 -0.115 -1.897 0.075 3.761 0.005 0 0.486 0.523 0.144 0.234 0.337
0.40 -2.601 1.771 -0.141 -1.916 -0.001 3.513 0.004 0 0.491 0.559 0.158 0.219 0.332
0.33 -1.309 1.112 -0.051 -1.957 -0.020 3.442 0.004 0 0.460 0.510 0.178 0.212 0.339
0.29 0.025 0.441 0.047 -2.134 -0.037 3.759 0.006 0 0.455 0.505 0.201 0.215 0.356
0.25 0.127 0.413 0.051 -2.219 -0.051 3.695 0.007 0 0.468 0.528 0.220 0.221 0.374
0.22 0.139 0.448 0.040 -2.259 -0.038 3.476 0.007 0 0.478 0.546 0.233 0.222 0.385
0.20 0.136 0.455 0.038 -2.266 -0.044 3.363 0.007 0 0.468 0.576 0.240 0.223 0.392
0.17 0.021 0.556 0.016 -2.240 -0.026 2.997 0.006 0 0.423 0.542 0.263 0.234 0.413
0.14 -0.289 0.741 -0.013 -2.240 -0.023 2.676 0.006 0 0.403 0.516 0.277 0.236 0.428
0.13 -0.119 0.593 0.011 -2.243 -0.035 2.402 0.007 0 0.412 0.490 0.285 0.236 0.437
0.11 -0.015 0.476 0.031 -2.219 -0.044 2.316 0.006 0 0.411 0.456 0.288 0.233 0.439
0.10 -0.221 0.522 0.030 -2.193 -0.062 2.300 0.006 0 0.412 0.435 0.283 0.231 0.437
""")
[docs]class TusaLanger2016RepiBA08DE(TusaLanger2016RepiBA08SE):
"""
Implements Tusa and Langer (2016) using the BA08 model and DE.
Extends
:class:`openquake.hazardlib.gsim.tusa_langer_2016.TusaLanger2016RepiBA08SE`
because the same functional form is used, only the coefficients differ.
"""
# Coefficients from Table 9 (PGA) and Table 13 (SA); sigma values in log
COEFFS = CoeffsTable(sa_damping=5, table="""
IMT a b1 b2 c1 c2 h c3 sA sB sD SigmaIE SigmaIS SigmaTot
pga 2.527 -0.397 0.094 -1.998 0.315 9.6080 0.000 0 -0.200 0.002 0.161 0.276 0.399
10.0 -3.019 -0.236 0.123 -0.716 0.144 2.0850 -0.004 0 0.115 0.006 0.170 0.203 0.342
5.00 -2.383 -0.325 0.147 -0.695 0.062 2.0800 -0.002 0 0.120 0.003 0.167 0.213 0.347
3.33 -2.170 -0.307 0.155 -0.633 0.002 2.2200 -0.002 0 0.107 -0.023 0.162 0.226 0.359
2.50 -2.038 -0.210 0.136 -0.620 0.053 2.1350 -0.003 0 0.132 -0.026 0.169 0.215 0.348
2.00 -1.977 -0.056 0.106 -0.625 0.120 2.3880 -0.004 0 0.139 -0.041 0.179 0.207 0.343
1.67 -1.893 0.048 0.088 -0.635 0.158 2.8030 -0.005 0 0.128 -0.040 0.179 0.206 0.340
1.43 -1.656 0.065 0.078 -0.667 0.199 3.2940 -0.005 0 0.136 -0.022 0.186 0.208 0.345
1.25 -1.441 0.059 0.075 -0.702 0.216 4.0100 -0.005 0 0.145 0.004 0.189 0.206 0.344
1.11 -1.054 0.025 0.076 -0.834 0.229 5.5460 -0.004 0 0.140 -0.003 0.193 0.203 0.346
1.00 -0.945 0.041 0.074 -0.871 0.226 5.5910 -0.004 0 0.140 -0.007 0.191 0.201 0.345
0.67 0.202 -0.354 0.121 -0.902 0.244 3.9200 -0.003 0 0.151 0.050 0.183 0.197 0.340
0.50 1.322 -0.596 0.146 -1.135 0.256 5.9340 -0.002 0 0.062 0.037 0.181 0.201 0.342
0.40 2.073 -0.688 0.152 -1.420 0.274 7.0510 0.000 0 0.021 0.024 0.186 0.207 0.351
0.33 2.131 -0.635 0.144 -1.484 0.277 6.8740 0.000 0 0.037 0.035 0.191 0.223 0.362
0.29 2.496 -0.600 0.138 -1.761 0.282 8.2450 0.002 0 0.046 0.050 0.195 0.238 0.371
0.25 2.651 -0.482 0.116 -1.953 0.305 8.8410 0.003 0 0.021 0.051 0.189 0.252 0.380
0.22 2.967 -0.358 0.097 -2.294 0.296 10.742 0.006 0 -0.014 0.058 0.183 0.260 0.383
0.20 3.633 -0.334 0.091 -2.764 0.299 12.651 0.009 0 -0.061 0.666 0.177 0.269 0.389
0.17 3.837 -0.311 0.085 -2.820 0.301 13.203 0.007 0 -0.145 0.079 0.178 0.282 0.403
0.14 3.980 -0.328 0.081 -2.811 0.316 13.357 0.006 0 -0.197 0.051 0.177 0.292 0.414
0.13 4.139 -0.335 0.077 -2.879 0.337 13.486 0.006 0 -0.232 0.015 0.183 0.306 0.427
0.11 3.918 -0.339 0.077 -2.736 0.342 12.535 0.005 0 -0.241 -0.025 0.186 0.312 0.434
0.10 3.746 -0.339 0.074 -2.612 0.354 12.019 0.004 0 -0.247 -0.054 0.192 0.317 0.443
""")
[docs]class TusaLanger2016RepiSP87SE(TusaLanger2016RepiBA08SE):
"""
Implements Tusa and Langer (2016) using the SP87 model and SE.
Extends
:class:`openquake.hazardlib.gsim.tusa_langer_2016.TusaLanger2016RepiBA08SE`
with modification to the functional form and different coefficients.
"""
def _compute_distance(self, rup, dists, C):
"""
Compute the distance function, equation (5).
"""
rval = np.sqrt(dists.repi ** 2 + C['h'] ** 2)
return C['c1'] * np.log10(rval)
def _compute_magnitude(self, rup, C):
"""
Compute the magnitude function, equation (5).
"""
return C['a'] + (C['b1'] * (rup.mag))
# Coefficients from Table 8 (PGA) and Table 10 (SA); sigma values in log
COEFFS = CoeffsTable(sa_damping=5, table="""
IMT a b1 c1 h sA sB sD SigmaIE SigmaIS SigmaTot
pga -1.186 0.726 -1.719 1.551 0 0.357 0.376 0.223 0.229 0.393
10.0 -5.799 1.335 -1.408 2.731 0 0.379 0.354 0.165 0.243 0.351
5.00 -5.528 1.424 -1.274 2.510 0 0.336 0.280 0.165 0.263 0.364
3.33 -4.975 1.464 -1.415 4.285 0 0.312 0.268 0.167 0.265 0.371
2.50 -4.410 1.454 -1.568 5.747 0 0.354 0.348 0.156 0.258 0.360
2.00 -4.116 1.435 -1.589 5.364 0 0.387 0.368 0.155 0.252 0.357
1.67 -3.676 1.352 -1.611 4.623 0 0.410 0.386 0.149 0.238 0.343
1.43 -3.328 1.265 -1.573 4.078 0 0.438 0.383 0.143 0.243 0.342
1.25 -2.978 1.189 -1.568 3.866 0 0.432 0.378 0.132 0.247 0.341
1.11 -2.808 1.143 -1.536 3.520 0 0.441 0.390 0.127 0.257 0.347
1.00 -2.655 1.108 -1.530 3.248 0 0.454 0.406 0.124 0.264 0.354
0.67 -2.077 0.954 -1.468 2.577 0 0.491 0.471 0.128 0.249 0.340
0.50 -1.474 0.866 -1.595 2.795 0 0.426 0.468 0.145 0.238 0.339
0.40 -1.113 0.778 -1.613 2.585 0 0.433 0.506 0.160 0.223 0.334
0.33 -0.839 0.729 -1.662 2.575 0 0.410 0.463 0.179 0.216 0.340
0.29 -0.739 0.725 -1.723 2.615 0 0.395 0.448 0.202 0.221 0.358
0.25 -0.661 0.710 -1.757 2.484 0 0.396 0.458 0.220 0.229 0.377
0.22 -0.574 0.688 -1.777 2.297 0 0.389 0.458 0.233 0.232 0.388
0.20 -0.501 0.669 -1.795 2.247 0 0.376 0.484 0.241 0.233 0.395
0.17 -0.357 0.643 -1.844 2.125 0 0.333 0.450 0.263 0.242 0.415
0.14 -0.275 0.623 -1.873 1.921 0 0.307 0.417 0.277 0.244 0.430
0.13 -0.334 0.627 -1.863 1.669 0 0.304 0.440 0.286 0.245 0.439
0.11 -0.427 0.640 -1.843 1.593 0 0.303 0.341 0.289 0.242 0.442
0.10 -0.538 0.653 -1.814 1.556 0 0.306 0.322 0.285 0.241 0.440
""")
[docs]class TusaLanger2016RepiSP87DE(TusaLanger2016RepiSP87SE):
"""
Implements Tusa and Langer (2016) using the SP87 model and DE.
Extends
:class:`openquake.hazardlib.gsim.tusa_langer_2016.TusaLanger2016RepiSP87SE`
because the same functional form is used, only the coefficients differ.
"""
# Coefficients from Table 8 (PGA) and Table 11 (SA); sigma values in log
COEFFS = CoeffsTable(sa_damping=5, table="""
IMT a b1 c1 h sA sB sD SigmaIE SigmaIS SigmaTot
pga -0.377 0.765 -1.824 9.5270 0 -0.202 0.004 0.162 0.277 0.402
10.0 -4.942 0.877 -1.035 6.1470 0 0.122 0.013 0.172 0.204 0.344
5.00 -4.444 0.853 -0.879 4.4510 0 0.133 0.017 0.170 0.213 0.349
3.33 -4.039 0.841 -0.841 4.6740 0 0.120 -0.011 0.165 0.227 0.361
2.50 -3.804 0.871 -0.886 5.6350 0 0.141 -0.019 0.172 0.216 0.350
2.00 -3.470 0.899 -1.015 7.4860 0 0.138 -0.044 0.181 0.208 0.345
1.67 -3.164 0.923 -1.134 8.8600 0 0.123 -0.048 0.181 0.207 0.342
1.43 -3.007 0.926 -1.140 9.0160 0 0.132 -0.029 0.187 0.209 0.348
1.25 -2.838 0.928 -1.169 9.5550 0 0.138 -0.006 0.191 0.207 0.348
1.11 -2.642 0.920 -1.200 9.7200 0 0.132 -0.013 0.194 0.204 0.348
1.00 -2.555 0.913 -1.182 9.2180 0 0.134 -0.015 0.192 0.201 0.348
0.67 -2.242 0.895 -1.130 6.9400 0 0.152 0.050 0.185 0.197 0.344
0.50 -1.567 0.858 -1.305 8.1620 0 0.056 0.031 0.185 0.201 0.346
0.40 -1.268 0.840 -1.359 7.5770 0 0.018 0.023 0.190 0.207 0.355
0.33 -1.201 0.839 -1.349 6.9760 0 0.032 0.034 0.194 0.223 0.366
0.29 -1.072 0.833 -1.385 6.9500 0 0.045 0.055 0.197 0.239 0.375
0.25 -0.908 0.825 -1.442 6.8940 0 0.023 0.061 0.190 0.253 0.384
0.22 -0.697 0.806 -1.505 7.4290 0 0.001 0.083 0.183 0.262 0.387
0.20 -0.535 0.794 -1.558 7.6410 0 -0.031 0.109 0.177 0.271 0.393
0.17 -0.097 0.777 -1.763 9.0800 0 -0.116 0.119 0.177 0.284 0.406
0.14 0.215 0.758 -1.907 10.038 0 -0.172 0.085 0.176 0.294 0.416
0.13 0.215 0.758 -1.907 10.038 0 -0.172 0.085 0.182 0.307 0.430
0.11 0.239 0.747 -1.930 9.6770 0 -0.221 0.004 0.184 0.313 0.437
0.10 0.219 0.745 -1.929 9.6990 0 -0.233 -0.031 0.191 0.318 0.446
""")
[docs]class TusaLanger2016Rhypo(TusaLanger2016RepiBA08SE):
"""
Implements the GMPE using the BA08 model and hypocentral distance (not
described in Tusa and Langer, 2016). This version has been developed in the
frame of V3-2012 INGV-DPC Project in order to perform PSHA calculations
when topography is taken into consideration (e.g. the flanks of Mt Etna),
hence dependence on vertical distance is required.
Extends
:class:`openquake.hazardlib.gsim.tusa_langer_2016.TusaLanger2016RepiBA08SE`
because the same functional form is used, only the distance type and
coefficients differ.
"""
# Required distance measure is Rhypo
REQUIRES_DISTANCES = set(('rhypo', ))
def _compute_distance(self, rup, dists, C):
"""
Compute the distance function, equation (9):
"""
mref = 3.6
rref = 1.0
rval = np.sqrt(dists.rhypo ** 2 + C['h'] ** 2)
return (C['c1'] + C['c2'] * (rup.mag - mref)) *\
np.log10(rval / rref) + C['c3'] * (rval - rref)
# Coefficients provided by Giuseppina Tusa in excel file
# 'SpectralAccXLaura.xlsx' (email dated May 29, 2016) with modification
# to pga coefficients in Catania (personal communication, July, 2016);
# sigma values in log
COEFFS = CoeffsTable(sa_damping=5, table="""
IMT a b1 b2 c1 c2 h c3 sA sB sD SigmaTot
pga 0.3290 0.1050 0.0760 -2.1110 0.0390 1.5530 0.0060000 0 0.45000 0.45700 0.3940
0.10 0.8594 0.0525 0.0790 -2.2258 0.0066 1.8689 0.0068670 0 0.41397 0.42120 0.4424
0.20 1.0619 0.0418 0.0804 -2.2684 0.0194 2.6969 0.0072450 0 0.47176 0.56672 0.3960
0.25 0.9928 0.0316 0.0904 -2.2318 0.0067 3.1724 0.0067460 0 0.47069 0.51751 0.3779
0.40 -1.8031 1.4272 -0.1051 -1.9414 0.0496 3.0608 0.0047120 0 0.49105 0.54594 0.3353
0.50 -1.4907 1.2390 -0.0806 -1.9292 0.1235 3.3918 0.0049110 0 0.48505 0.50924 0.3401
1.00 -0.6283 0.3082 0.0638 -1.5327 0.2391 2.7319 0.0005733 0 0.46483 0.40585 0.3549
1.25 -1.8557 0.7888 0.0174 -1.4873 0.1883 3.0522 -0.0006545 0 0.43149 0.36715 0.3426
2.00 -4.8586 1.7503 -0.0610 -1.1999 0.0767 2.8470 -0.0043670 0 0.36832 0.34906 0.3567
""")