It is obviously frozen and you need to find where, thaw it out and do what ever is necessary to prevent it from happening again. If you want to wait till spring then there is nothing you can do except wait till the spring thaw. Only turn on power to test the sysyem to see if water is flowing. If it is not flowing the pump will keep running and not turn off and could burn out. This is the hum / vibration you noticing.