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Grossmont College Griffin Gate

Wednesday October 10, 2018, 7-9pm. We're currently scheduling our fall 2018 events for the month of October. If you would like PPI to come to your San Diego Branch Public Library, college campus, or other learning institution, contact This email address is being protected from spambots. You need JavaScript enabled to view it..

honoring the heroes of

skeptical inquiry

Faraday Cage: "Faraday" refers to physicist Michael Faraday, who in 1836 invented the Faraday cage. Also known as a "Faraday shield," Faraday cages do not have to take the form of an actual cage, but rather can be any sort of enclosure surrounded or lined by a mesh of conducting material that blocks electrical fields and radio frequencies. Its use in paranormal investigating is largely experimental and theoretical: working from the major premise that electromagnetism is a common principle of our physical universe and the unknown physical universe of the spirit realm, it provides an opportunity to rule out localized EMF pollution as the source of paranormal activity: if activity occurs within the Faraday enclosure, and it cannot be rationally explained by any other devices within, then its origins are potentially paranormal.

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EVP: Infrasound, Ultrasound or Something Else?

Over the years there has been a lot of debate regarding the nature of Electronic Voice Phenomena or EVP. One prevailing idea is that EVP is composed of either ultrasonic or infrasonic sound waves, and that is the reason why investigators are unable to hear EVP at the time of capture. Although this is an elegant idea, it is unlikely because it defies the basic understandings of acoustic energy.

PPI Podcast #13: Turn of the Screw - After Show Discussion (2012)

Join Pacific Paranormal Investigations and Savannah Sincoff, LCSW, for a lively discussion following the Intrepid Shakespeare Company's production of The Turn of the Screw, adapted by Jeffrey Hatcher from the novella by Henry James. PPI and Savannah Sincoff disect the story and characters of The Turn of the Screw as if it were a modern day paranormal investigation. Moderated by Tom Hall.

Recorded April 15, 2012 at the Performing Arts Center of the San Dieguito Academy, Encinitas, CA

Length: 00:45:18