From e1da043eb34ed7564aaa89de7d376ade31a1225b Mon Sep 17 00:00:00 2001
From: Peter Powers <pmpowers@usgs.gov>
Date: Wed, 15 Jun 2022 22:20:50 -0600
Subject: [PATCH] kuehn seattle
---
.../gov/usgs/earthquake/nshmp/gmm/Gmm.java | 7 ++
.../earthquake/nshmp/gmm/KuehnEtAl_2020.java | 68 ++++++++++---------
2 files changed, 43 insertions(+), 32 deletions(-)
diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
index 62b0ffdc..6cb01c5b 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java
@@ -533,6 +533,13 @@ public enum Gmm {
KuehnEtAl_2020.COEFFS,
KuehnEtAl_2020.CONSTRAINTS_INTERFACE),
+ /** @see KuehnEtAl_2020 */
+ KBCG_20_SEATTLE_M9_INTERFACE_BASIN(
+ KuehnEtAl_2020.SeattleInterfaceBasin.class,
+ KuehnEtAl_2020.SeattleInterfaceBasin.NAME,
+ KuehnEtAl_2020.COEFFS,
+ KuehnEtAl_2020.CONSTRAINTS_INTERFACE),
+
/** @see KuehnEtAl_2020 */
KBCG_20_CASCADIA_SLAB_BASIN(
KuehnEtAl_2020.CascadiaSlabBasin.class,
diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
index 03d06ae9..7db6a4f9 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
@@ -87,6 +87,10 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
*
* Value of k2 (hard-coded in Python) for PGV is a typo, the value should be
* -1.955 but -1.995 is used
+ *
+ * TODO cascadia automatically include kuehn seattle behavior, seattle flag
+ * only for M9 : means by default cascadia interface is looking for site term
+ *
*/
static final String NAME = "Kuehn et al. (2020)";
@@ -180,34 +184,14 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
θ1 = (slab) ? coeffs.get("theta_1_slab_reg_Ca") : coeffs.get("theta_1_if_reg_Ca");
θ6_2 = coeffs.get("theta_6_2_reg_Ca");
θ7 = coeffs.get("theta_7_reg_Ca");
-
- // if (basin == Basin.SEATTLE) {
- // θ11 = 0;
- // θ11S = coeffs.get("mean_residual_Seattle_basin");
- // θ12 = 0;
- // } else {
- // θ11 = coeffs.get("intercept_Ca");
- // θ11S = coeffs.get("mean_residual_Seattle_basin");
- // θ12 = coeffs.get("slope_Ca");
- // }
-
} else if (zone == ALASKA) {
-
θ1 = (slab) ? coeffs.get("theta_1_slab_reg_Al") : coeffs.get("theta_1_if_reg_Al");
θ6_2 = coeffs.get("theta_6_2_reg_Al");
θ7 = coeffs.get("theta_7_reg_Al");
- // θ11 = 0;
- // θ11S = 0;
- // θ12 = 0;
-
- } else {
- // global
+ } else { // global
θ1 = (slab) ? coeffs.get("mu_theta_1_slab") : coeffs.get("mu_theta_1_if");
θ6_2 = coeffs.get("mu_theta_6");
θ7 = coeffs.get("mu_theta_7");
- // θ11 = 0;
- // θ11S = 0;
- // θ12 = 0;
}
θ10 = 0.0; // Table 4.1: fixed to 0
@@ -252,12 +236,12 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
public LogicTree<GroundMotion> calc(GmmInput in) {
double pgaRef = exp(calcPgaRef(coeffsPGA, in.Mw, in.rRup, in.zTor));
- double μ = calcMean(coeffs, basin(), seattle(),
+ double μ = calcMean(coeffs, slab(), basin(), seattle(),
in.Mw, in.rRup, in.zTor, in.vs30, in.z2p5, pgaRef);
// short periods can't be lower than PGA
if (coeffs.imt.isSA() && coeffs.imt.period() <= 0.1) {
- double μPga = calcMean(coeffsPGA, basin(), seattle(),
+ double μPga = calcMean(coeffsPGA, slab(), basin(), seattle(),
in.Mw, in.rRup, in.zTor, in.vs30, in.z2p5, pgaRef);
μ = max(μ, μPga);
}
@@ -288,6 +272,7 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
private static double calcMean(
Coefficients c,
+ boolean slab,
boolean basin,
boolean seattle,
double Mw,
@@ -302,7 +287,7 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
double fDepth = depthTerm(c, zTor);
double fAtten = arcCrossingTerm(c, rRup);
double fSite = siteAmpTerm(c, vs30, pgaRef);
- double fBasin = basin ? basinTerm(c, vs30, z2p5, seattle) : 0.0;
+ double fBasin = basin ? basinTerm(c, vs30, z2p5, slab, seattle) : 0.0;
return c.θ1 + fMag + fGeom + fDepth + fAtten + fSite + fBasin;
}
@@ -375,6 +360,7 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
Coefficients c,
double vs30,
double z2p5,
+ boolean slab,
boolean seattle) {
if (Double.isNaN(z2p5)) {
@@ -383,15 +369,15 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
double z2p5m = z2p5 * 1000.0;
double δlnZ = log(z2p5m) - basinZref(vs30);
- double fb = c.θ11 + c.θ12 * δlnZ;
- fb = Math.min(fb, c.θ11S); // Seattle cap
-
- if (seattle && z2p5 > 6.0 & c.imt.period() > 1.9) {
- double δz2p5adj = log(z2p5m) - LN_Z2P5_REF_KUEHN;
- double m9adj = log(2.0) - (c.θ11 + c.θ12 * δz2p5adj);
- fb += m9adj;
+ double fb = 0.0; // Seattle cap
+ if (seattle) {
+ fb = c.θ11S;
+ if (!slab && z2p5 > 6.0 & c.imt.period() > 1.9) {
+ fb = log(2.0); // M9 scaling
+ }
+ } else {
+ fb = Math.min(c.θ11 + c.θ12 * δlnZ, c.θ11S); // Seattle cap
}
-
return fb;
}
@@ -532,6 +518,24 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
}
}
+ static final class SeattleInterfaceBasin extends CascadiaInterface {
+ static final String NAME = CascadiaInterface.NAME + " (Seattle basin)";
+
+ SeattleInterfaceBasin(Imt imt) {
+ super(imt);
+ }
+
+ @Override
+ boolean basin() {
+ return true;
+ }
+
+ @Override
+ boolean seattle() {
+ return true;
+ }
+ }
+
static final class CascadiaSlabBasin extends CascadiaSlab {
static final String NAME = CascadiaSlab.NAME + " (basin)";
--
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