Simple Harmonic Motion at my desk

From: Gaurav, Devashish
Sent: Friday, September 25, 2009 5:22 PM
To: [Undisclosed DistributionList]
Cc: [Undisclosed DistributionList]
Subject: RE: Simple Harmonic Motion at my desk

Hi,

Apologies if this is the incorrect distribution list for this query.

I am located in ecospace tower B 5th Floor bay 7 workstation no. BDC4B.05.343. I’ve noticed some abnormalities at my desk. Between 3 pm to 5 pm my desk shakes at a regular interval of say 10 to 12 minutes. Although, the experience is not like a roller coaster ride but it certainly feels like we are experiencing some sort of earthquake. We are exceptionally unaware of the reason behind it. But, I am pretty sure that it’s definitely not earthquake as Online Richter scale shows 0 reading. Earlier I thought, it’s the spring in my chair but even after replacing 7 chairs problem still persists, so faulty chair possibility is ruled out. High Five !!! 

I have this inner conscience, whenever these technical failures come up, allows me to give wild guesses which may or may not be right. So, my guess would be whenever all the 4 lifts crosses 5th floor simultaneously, it creates a simple harmonic motion (SHM) consequently creating this anomaly. But there are many unanswered questions which are myths, like, why it happens only between 3 pm and 5 pm and why other people can’t experience it etc.

We would be really glad if someone from Seismological department has a look into this so called artificial earthquake because we really do not like shaking at regular intervals. I am assuming that Our Company has Seismological department in place, in case there is no such department could you guys please consult ISRO or NASA for the same?

Thanks in advance.

Thank You and Best Regards,

Devashish Gaurav