diff --git a/src/org/opensha2/gmm/Atkinson_2015.java b/src/org/opensha2/gmm/Atkinson_2015.java
new file mode 100644
index 0000000000000000000000000000000000000000..fa6f488bc926b4d2ceb702fee87c906cafd9e0bc
--- /dev/null
+++ b/src/org/opensha2/gmm/Atkinson_2015.java
@@ -0,0 +1,93 @@
+package org.opensha2.gmm;
+
+import static java.lang.Math.pow;
+import static java.lang.Math.max;
+import static java.lang.Math.sqrt;
+import static org.opensha2.gmm.GmmInput.Field.MAG;
+import static org.opensha2.gmm.GmmInput.Field.RRUP;
+import static org.opensha2.gmm.GmmInput.Field.VS30;
+import static org.opensha2.gmm.GmmUtils.BASE_10_TO_E;
+import static org.opensha2.gmm.GmmUtils.LN_G_CM_TO_M;
+
+import java.util.Map;
+
+import org.opensha2.gmm.GmmInput.Constraints;
+
+import com.google.common.collect.Range;
+
+/**
+ * Implementation of the ground motion model by Atkinson (2015) for induced
+ * seismicity.
+ *
+ * <p><b>Note:</b> Direct instantiation of {@code GroundMotionModel}s is
+ * prohibited. Use {@link Gmm#instance(Imt)} to retrieve an instance for a
+ * desired {@link Imt}.</p>
+ *
+ * <p><b>Reference:</b> Atkinson, G.M., 2015, Ground-motion prediction equation
+ * for small-to-moderate events at short hypocentral distances, with application
+ * to induced-seismicity hazards: Bulletin of the Seismological Society of
+ * America, v. 105, p. 981-992.</p>
+ *
+ * <p><b>doi:</b><a href="http://dx.doi.org/10.1785/0120140142">
+ * 10.1785/0120140142</a></p>
+ *
+ * <p><b>Component:</b> orientation-independent horizontal</p>
+ *
+ * @author Peter Powers
+ * @see Gmm#AM_09_INTER
+ */
+public final class Atkinson_2015 implements GroundMotionModel {
+
+ static final String NAME = "Atkinson (20015)";
+
+ // TODO
+ static final Constraints CONSTRAINTS = Constraints.builder()
+ .set(MAG, Range.closed(3.0, 6.0))
+ .set(RRUP, Range.closed(0.0, 300.0))
+ .set(VS30, Range.singleton(760.0))
+ .build();
+
+ static final CoefficientContainer COEFFS = new CoefficientContainer("Atkinson15.csv");
+
+ private static final class Coefficients {
+
+ final Imt imt;
+ final double c0, c1, c2, c3, c4, φ, τ, σ;
+
+ Coefficients(Imt imt, CoefficientContainer cc) {
+ this.imt = imt;
+ Map<String, Double> coeffs = cc.get(imt);
+ c0 = coeffs.get("c0");
+ c1 = coeffs.get("c1");
+ c2 = coeffs.get("c2");
+ c3 = coeffs.get("c3");
+ c4 = coeffs.get("c4");
+ φ = coeffs.get("phi");
+ Ï„ = coeffs.get("tau");
+ σ = coeffs.get("sigma");
+ }
+ }
+
+ private final Coefficients coeffs;
+
+ Atkinson_2015(final Imt imt) {
+ coeffs = new Coefficients(imt, COEFFS);
+ }
+
+ @Override public final ScalarGroundMotion calc(final GmmInput in) {
+ double μ = calcMean(coeffs, in);
+ double σ = coeffs.σ * BASE_10_TO_E;
+ return DefaultScalarGroundMotion.create(GmmUtils.ceusMeanClip(coeffs.imt, μ), σ);
+ }
+
+
+ private static final double calcMean(final Coefficients c, final GmmInput in) {
+ double Mw = in.Mw;
+ double rRup = in.rRup;
+ double h_eff = max(1, pow(10, -1.72 + 0.43 * Mw));
+ double r = sqrt(rRup * rRup + h_eff * h_eff);
+ double μ = c.c0 + c.c1 * Mw + c.c2 * Mw * Mw + c.c3 * r + c.c4 * r;
+ return μ * BASE_10_TO_E - LN_G_CM_TO_M;
+ }
+
+}
diff --git a/src/org/opensha2/gmm/Gmm.java b/src/org/opensha2/gmm/Gmm.java
index 268f53f84a13b2cc179166fc724d779e0c3ca014..c56e6c0607fd338afc364514da66bf1f972f3e62 100644
--- a/src/org/opensha2/gmm/Gmm.java
+++ b/src/org/opensha2/gmm/Gmm.java
@@ -382,6 +382,13 @@ public enum Gmm {
// Other
+ /** @see Atkinson_2015 */
+ ATKINSON_15(
+ Atkinson_2015.class,
+ Atkinson_2015.NAME,
+ Atkinson_2015.COEFFS,
+ Atkinson_2015.CONSTRAINTS),
+
/** @see SadighEtAl_1997 */
SADIGH_97(
SadighEtAl_1997.class,
@@ -619,6 +626,7 @@ public enum Gmm {
OTHER(
"Others",
ImmutableList.of(
+ ATKINSON_15,
AB_03_CASC_INTER,
MCVERRY_00_CRUSTAL,
MCVERRY_00_INTERFACE,
@@ -633,7 +641,7 @@ public enum Gmm {
this.name = name;
this.gmms = gmms;
}
-
+
@Override public String toString() {
return name;
}
diff --git a/src/org/opensha2/gmm/coeffs/Atkinson15.csv b/src/org/opensha2/gmm/coeffs/Atkinson15.csv
new file mode 100644
index 0000000000000000000000000000000000000000..23775d43f9044a19e83de3cb71c84abebee3c27a
--- /dev/null
+++ b/src/org/opensha2/gmm/coeffs/Atkinson15.csv
@@ -0,0 +1 @@
+T,c0,c1,c2,c3,c4,phi,tau,sigma
PGA,-2.376,1.818,-0.1153,-1.752,-0.002,0.28,0.24,0.37
PGV,-4.151,1.762,-0.09509,-1.669,-0.0006,0.27,0.19,0.33
0.03,-2.283,1.842,-0.1189,-1.785,-0.002,0.28,0.27,0.39
0.05,-2.018,1.826,-0.1192,-1.831,-0.002,0.28,0.3,0.41
0.1,-1.954,1.83,-0.1185,-1.774,-0.002,0.29,0.25,0.39
0.2,-2.266,1.785,-0.1061,-1.657,-0.0014,0.3,0.21,0.37
0.3,-2.794,1.852,-0.1078,-1.608,-0.00105,0.3,0.19,0.36
0.5,-3.873,2.06,-0.1212,-1.544,-0.0006,0.29,0.2,0.35
1,-4.081,1.742,-0.07381,-1.481,0,0.26,0.22,0.34
2,-4.462,1.485,-0.03815,-1.361,0,0.24,0.23,0.33
3,-3.827,1.06,0.009086,-1.398,0,0.24,0.22,0.32
5,-4.321,1.08,0.009376,-1.378,0,0.25,0.18,0.31
\ No newline at end of file