Modem keeps rebooting

We had an outage Comcast notified us of on December 3rd and 4th.  Ever since then, our modem has been rebooting every 5-15 minutes or so.  I've tried unplugging the modem for a minute and then plugging it back in.  It is an Arris G18 I own.  Is it possible this is a side effect of the outage?