I landed here are home and my elt went off, no it wasn't that bad of a landing.
I taxied to the shed and got in the baggage compartment to turn it off because the G meter switch can't be turned off from the dash.
10 mins from the time it went off a police officer rolled in.
He said air force called county sheriff and county call local police who were guided right to my plane via directions from the air force.
Pretty fast IMO.
I don't know why it went off but if yours does someone is coming pretty fast....

Airtex 345 elt.