From b542a99293364051a08dfb2c86afb3b4e13dd12d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludger=20K=C3=BCperkoch?= <kueperkoch@bestec-for-nature.com>
Date: Tue, 15 Aug 2017 13:06:26 +0200
Subject: [PATCH] Relaxed checkZ4S, vertical component RMS must exceed average
 RMS of both horizontal components.

---
 pylot/core/pick/utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pylot/core/pick/utils.py b/pylot/core/pick/utils.py
index c024985f..c6d5b014 100644
--- a/pylot/core/pick/utils.py
+++ b/pylot/core/pick/utils.py
@@ -1036,7 +1036,7 @@ def checkZ4S(X, pick, zfac, checkwin, iplot, fig=None):
     rmse = RMS(edat[0].data[isignale])
 
     # calculate threshold
-    minsiglevel = (rmsn + rmse) * zfac
+    minsiglevel = (rmsn + rmse) / 2 * zfac
 
     # vertical P-coda level must exceed horizontal P-coda level
     # zfac times encodalevel