Commonly due to seismic activity. There are little tremours in the earth causing small vibrations in the crust. The alarm is too sensitive, you should get it calibrated.
Could be a bad fuse... or another alarm went off near your car.
Viper Car Alarms also makes a car alarm system that will announce to anyone who comes within a certain proximity to your car, "Protected by Viper. Stand back". This has been a feature in some of their alarms for many years. Many people associate this slogan with the Viper Car Alarm brand. A GSM car alarm will tell you to stand back befor you touch the car. That is so that you have warning before it goes off.
I believe its only 9volts, because if the power goes out that 9 volt battery will still keep the alarm activated.
The Hennessey Venom Viper goes 260mph!
An alarm clock will typically beep for about an hour when it goes off. This is if the alarm is not turned off first.
Rhys Loaney goes by Viper.
Ryan Keelaghan goes by Viper.
Sathish Sathish goes by Viper.
MC Viper is becoming one of the most recognized House and Garage MC's in the business. Although he goes by MC Viper professionally, his birth name is Jamie Thomas.
fix it
alarm clock
Easy, an alarm.