Santa Clara County OES, California
ARES/RACES

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MODIFIED MERCALLI SCALE

The Modified Mercalli, or Mike-Mike scale is used by Santa Clara County ARES/RACES to standardize and make more efficient the reporting of earthquake damage.   Instead of reporting damage by using general descriptions like "major" or "minor" or "heavy", a Mike-Mike value is reported. This value is quick and simple to communicate over the air and equates to a standard level of damage as defined in the scale below.

Mike-Mike Value Short Description
Mike-Mike-1Not felt at all
Mike-Mike-2

Barely noticed

Mike-Mike-3Know it was an earthquake somewhere
Mike-Mike-4Windows, dishes rattle
Mike-Mike-5Pictures move, doors swing, small items on floor
Mike-Mike-6Glassware broken, books off shelf, floor lamps topple
Mike-Mike-7Furniture broken, cannot stand, chimneys fall
Mike-Mike-8Buildings collapsed

Response Format: "<your-call-sign>, <your-city>, <MM-number>, <your-call-sign>"

Example: "KE6AGJ, Los Altos, Mike-Mike 4, KE6AGJ"

 

Business Card size MM Scale, Acrobat file

10 Business Cards on a sheet, Acrobat File
This is set up for Avery Business Card stock, 10 - 2x3.5" cards per sheet.
When printing, set the Page Scaling Option to "None".

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This page updated 08/21/17