From 2a212aca66d109932dabae5ce085533ffe7b3e8e Mon Sep 17 00:00:00 2001
From: Peter Powers <pmpowers@usgs.gov>
Date: Wed, 21 Feb 2024 08:56:55 -0700
Subject: [PATCH] fixes to individual seeds to handle PGV
---
.../usgs/earthquake/nshmp/gmm/NgaEast.java | 57 ++++++++++++++-----
1 file changed, 44 insertions(+), 13 deletions(-)
diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/NgaEast.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/NgaEast.java
index c68317b8..2b7bedf7 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/NgaEast.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/NgaEast.java
@@ -13,7 +13,7 @@ import static java.lang.Math.exp;
import static java.lang.Math.log;
import static java.lang.Math.min;
import static java.lang.Math.sqrt;
-import static java.util.stream.Collectors.toMap;
+import static java.util.stream.Collectors.toUnmodifiableMap;
import java.io.IOException;
import java.net.URL;
@@ -197,11 +197,11 @@ public abstract class NgaEast implements GroundMotionModel {
.stream()
.skip(1)
.map(line -> Text.splitToList(line, Delimiter.COMMA))
- .collect(toMap(
- entry -> entry.get(0),
- entry -> Double.valueOf(entry.get(1))));
+ .collect(toUnmodifiableMap(
+ e -> e.get(0),
+ e -> Double.valueOf(e.get(1))));
checkWeights(wtMap.values());
- return Map.copyOf(wtMap);
+ return wtMap;
} catch (IOException ioe) {
throw new RuntimeException(ioe);
@@ -556,15 +556,26 @@ public abstract class NgaEast implements GroundMotionModel {
static final String NAME = NgaEast.NAME + " Seed Tree (2018)";
static final String SEED_PREFIX = "NGA_EAST_SEED_";
static final String SP16_ID = "SP16";
- static final Set<Gmm> noPgvSeeds = EnumSet.of(
- Gmm.NGA_EAST_SEED_PEER_GP,
+ static final Set<Gmm> NO_PGV_SEEDS = EnumSet.of(
+ Gmm.NGA_EAST_SEED_GRAIZER, // not used
Gmm.NGA_EAST_SEED_GRAIZER16,
Gmm.NGA_EAST_SEED_GRAIZER17,
+ Gmm.NGA_EAST_SEED_PEER_EX, // not used
+ Gmm.NGA_EAST_SEED_PEER_GP,
Gmm.NGA_EAST_SEED_PZCT15_M1SS,
Gmm.NGA_EAST_SEED_PZCT15_M2ES);
+ static final Set<String> NO_PGV_IDS = Set.of(
+ "Graizer",
+ "Graizer16",
+ "Graizer17",
+ "PEER_EX",
+ "PEER_GP",
+ "PZCT15_M1SS",
+ "PZCT15_M2ES");
/* Valid Seed IDs for table based models; skips SP16 */
static final List<String> SEED_TABLE_IDS; // size = 13
+ static final List<String> SEED_TABLE_IDS_PGV; // size = 8
/* All Gmms */
static final List<Gmm> GMMS; // pgv helper, size = 14
@@ -581,6 +592,7 @@ public abstract class NgaEast implements GroundMotionModel {
static {
List<String> tableIds = new ArrayList<>(); // valid IDs for tables
+ List<String> tableIdsPgv = new ArrayList<>(); // valid IDs for PGV tables
List<Gmm> gmms = new ArrayList<>();
List<String> μIds = new ArrayList<>();
List<Double> μWts = new ArrayList<>();
@@ -588,12 +600,16 @@ public abstract class NgaEast implements GroundMotionModel {
String seedId = e.getKey();
if (!seedId.equals(SP16_ID)) {
tableIds.add(seedId);
+ if (!NO_PGV_IDS.contains(seedId)) {
+ tableIdsPgv.add(seedId);
+ }
}
gmms.add(Gmm.valueOf(SEED_PREFIX + e.getKey().toUpperCase()));
μIds.add("Seed (" + seedId + ")");
μWts.add(e.getValue());
});
SEED_TABLE_IDS = List.copyOf(tableIds);
+ SEED_TABLE_IDS_PGV = List.copyOf(tableIdsPgv);
GMMS = List.copyOf(gmms);
MEAN_IDS = μIds.toArray(new String[μIds.size()]);
MEAN_WTS = μWts.stream()
@@ -615,9 +631,10 @@ public abstract class NgaEast implements GroundMotionModel {
}
private static Map<Gmm, GroundMotionTable> getImtTables(Imt imt) {
- return GroundMotionTables.getNgaEastSeeds(SEED_TABLE_IDS, imt)
+ List<String> ids = (imt == Imt.PGV) ? SEED_TABLE_IDS_PGV : SEED_TABLE_IDS;
+ return GroundMotionTables.getNgaEastSeeds(ids, imt)
.entrySet().stream()
- .collect(toMap(
+ .collect(toUnmodifiableMap(
e -> Gmm.valueOf(SEED_PREFIX + e.getKey().toUpperCase()),
Entry::getValue));
}
@@ -633,7 +650,7 @@ public abstract class NgaEast implements GroundMotionModel {
double μPga = exp(sp16pga.calcMeanRock(in.Mw, in.rJB));
SiteTerm fSite = siteAmp.calc(μPga, in.vs30);
μs[i] = fSite.apply(μ);
- } else if (imt == Imt.PGV && noPgvSeeds.contains(seed)) {
+ } else if (imt == Imt.PGV && NO_PGV_SEEDS.contains(seed)) {
// site is included when calling individual seed
μs[i] = UsgsPgvSupport.calcAB20Pgv(seed, in).mean();
} else {
@@ -688,7 +705,7 @@ public abstract class NgaEast implements GroundMotionModel {
if (seed == Gmm.NGA_EAST_SEED_SP16) {
μ = sp16.calcMeanRock(in.Mw, in.rJB);
μPga = sp16pga.calcMeanRock(in.Mw, in.rJB);
- } else if (imt == Imt.PGV && noPgvSeeds.contains(seed)) {
+ } else if (imt == Imt.PGV && NO_PGV_SEEDS.contains(seed)) {
// note rock input; TODO this doesn't really work as the PGV
// is conditioned on vs30 so site should already be applied
μ = UsgsPgvSupport.calcAB20Pgv(seed, inRock).mean();
@@ -766,10 +783,24 @@ public abstract class NgaEast implements GroundMotionModel {
public LogicTree<GroundMotion> calc(GmmInput in) {
double σEpri = sigmaEpri(in.Mw);
double σPanel = sigmaPanel(in.Mw, in.vs30);
- Position p = table.position(in.rRup, in.Mw);
+ // PGV fails if 'table' used; all seeds support PGA natively
+ Position p = pgaTable.position(in.rRup, in.Mw);
double μPga = exp(pgaTable.get(p));
SiteTerm fSite = siteAmp.calc(μPga, in.vs30);
- double μ = fSite.apply(table.get(p));
+
+ Gmm seedGmm = Gmm.valueOf(UsgsSeeds_2018.SEED_PREFIX + id.toUpperCase());
+ GmmInput inRock = GmmInput.builder().fromCopy(in).vs30(3000).build();
+ double μ = (imt == Imt.PGV && UsgsSeeds_2018.NO_PGV_SEEDS.contains(seedGmm))
+ ? UsgsPgvSupport.calcAB20Pgv(seedGmm, inRock).mean()
+ : table.get(p);
+ μ = fSite.apply(μ);
+
+ /*
+ * TODO the order of operations for PGV for individual seeds is consistent
+ * with seed 2023 but not seed 2018 and needs to be rechecked. Conditional
+ * PGV is dependent on vs30; should we realy be using the consitional
+ * model with vs30=3000
+ */
double σ = Maths.srssWeighted(
new double[] { σEpri, σPanel },
SIGMA_WTS);
--
GitLab