The answer to 'why is my electrical meter sparking' is that a sparking electrical meter is usually a sign of a serious electrical issue that requires immediate attention. This could be caused by a loose connection, water damage, or a problem with the meter itself.
Sparking meters are a fire hazard and should be addressed right away. Do not attempt to inspect or repair the meter yourself - this is a job for a licensed and qualified electrician. They will be able to diagnose the root cause and make any necessary repairs or replacements to ensure your electrical system is safe and functioning properly.