diff --git a/conf/event-generator/expdef.yml b/conf/event-generator/expdef.yml
index 34cc85846cae78d77ab436b0226f2a7cb07d305d..4439c74a0d971ea985e4e06394eba90d7fbdbea5 100644
--- a/conf/event-generator/expdef.yml
+++ b/conf/event-generator/expdef.yml
@@ -1,6 +1,6 @@
 experiment:
   DATELIST: 20201001
-  MEMBERS: "m[0-39]"
+  MEMBERS: "m[0-1]"
   CHUNKSIZEUNIT: hour
   CHUNKSIZE: 1
   NUMCHUNKS: 2