The answer is right in the log...

Code:
Mon Jun 27 04:04:44 2005
ARC1: Beginning to archive log 1 thread 1 sequence 13671
Creating archive destination LOG_ARCHIVE_DEST_1: '/u04/oradata/PROD/arch/S70_PROD_0000013671.arc'
Mon Jun 27 04:04:47 2005
Shutting down instance (abort)
License high water mark = 53
Mon Jun 27 04:04:51 2005
ARC1: Completed archiving log 1 thread 1 sequence 13671
Mon Jun 27 04:09:48 2005
PMON: terminating instance due to error 1092
The archiver started archiving log 13671 at 04:44, you shutdown abort at 04:47 and the archiver finished at 04:51.