JSI Tip 2891. ELogList freeware can dump and clear an event log on a local or remote computer.

ELogList, from SysInternals, can dump the contents of a local or remote event log, and optionally clear the log.

To install the program, just copy the executable to your path. I quote:

Usage: ELogList [-?] [-s] [\computer [-u username [-p password]]] [-n #] [-c] [eventlog]        -?            Displays the supported options and the units of measurement used for output values.       -s            This switch has ELogList print Event Log records one-per-line, with comma delimated fields.                     This format is convenient for text searches, e.g. eloglist | findstr /i text,                    and for importing the output into a spreadsheet.       \computer    Instead of showing process information for the local system, ELogList will show information                    for the NT/Win2K system specified. Include the -u switch with a username and password to login                    to the remote system if your security credentials do not permit you to obtain performance counter                    information from the remote system.       -u username   If you want to view an Event Log on a remote system and the account you are executing in                     does not have administrative privileges on the remote system then you must login as an administrator                    using this command-line option. ELogList will prompt you for the password without echoing your input                    to the display unless you specify the -p switch.       -p password   If you specify a user name and omit this switch ElogList will prompt you for a password.       -n #          Only display the number of most recent entries specified.       -c            Clear the event log after displaying.       eventlog      By default ELogList shows the contents of the System Event Log. Specify a different Event Log                    by typing in the first few letters of the log name, application, system, or security.