Engineers are using explosives to remove hard rock outside our office building. What countermeasures should we take?

Our building is located approx. 100 meters from the explosive charges. They happen several times per day, and really shake the entire building a lot. This is going to go on for many days and the blasts are supposed to get stronger.

Our server rooms are nothing fancy; one of them has all the racks on hard concrete while the other one has a raised floor (the one which allows the cables to go beneath it).

Does anyone have any tips, countermeasures or best practices for us?

Currently we are thinking of the following countermeasures:

• Daily report of the server rooms status lights (HD lights, power supplies and so on).
• Nightly check disk scan on the most important servers
• Order in extra supply of spare harddrives

Edit: Many good answers here! However one needs to be accepted. The highest voted answer at the time of this edit will get their answer accepted.

Solution 1:

If I were you, I'd call the company's insurance company, and have them place out an accelerometer.

This way - the insurance company will know that you're not the one shaking the disks, and the insurance company will know for sure when every blast has gone off, in case your SAN dies at the exact same moment.

(We did this.)

Solution 2:

Now would be the time to make sure you've verified your backup solution. All the replacement hardware in the world won't save you if your backups are corrupt or have otherwise been rendered useless.