diff --git a/geomagio/imfv122/IMFV122Parser.py b/geomagio/imfv122/IMFV122Parser.py
index 1c92647226e0b05b575b4b4694878b2907c76b24..2a496728db8a66822f630b305838d52fe23a6699 100644
--- a/geomagio/imfv122/IMFV122Parser.py
+++ b/geomagio/imfv122/IMFV122Parser.py
@@ -100,7 +100,7 @@ class IMFV122Parser(object):
             dayminute = int(start)
             hour = int(dayminute / 60)
             minute = dayminute % 60
-            self._delta = 1
+            self._delta = 60
         self._nexttime = UTCDateTime(
                 year=year,
                 julday=julday,