Our 2022 annual general meeting (AGM) will be held:

at 4:30pm on Monday, December 19, 2022
at Moose’s Down Under, Basement 830 West Pender St., Vancouver BC. V6C 1J8

The main order of business will be to elect the Directors of the BCGS and review the past year’s activity. Our bylaws allow for between 4 and 7 Directors. The majority of the current directors are standing for re-election. Graham Parkinson will be stepping down as vice-chair.

We are inviting interested persons to nominate themselves for election to join the Board of the BCGS. Please indicate your intent to do so by 23h59 on Wednesday, December 14, 2022.  All names of prospective candidates will then be included on the AGM notice to be emailed out the following business day.

The BCGS directors standing for re-election are:

We would like to remind you there are two classes of voting members in the BCGS:

1. General members. An annual fee of $20. Will be returned as a discount should they choose to enroll in our annual symposium; and
2. Student members. Free membership upon demonstration of enrollment in a post-secondary program at an accredited educational institution.

In order to participate in the vote, we ask that you pay your 2023 member dues online via the Paypal link below. These member dues will provide membership in the BCGS through 2023. Eligible students, as defined above, are entitled to vote. Please email the executive at info@bcgsonline.org to be added to the official member list.

BCGS Membership Options:

General $20.00 CAD

The AGM is open to all members and non-members.

November 2022 – Technical Talk

Speaker: Peter Kowalczyk, Chief Schientist Emeritus / Founder, Ocean Floor Geophysics

Title: Magnetic and Electric Fields around Subsea Cables – mapping and fault finding

Date: Wednesday, November 23, 2022

Time: 4:30pm to 5:30pm PST

Location: Room 111, 409 Granville Street, Vancouver, BC, V6C 1T2

Bio:
Peter is a founder of Ocean Floor Geophysics. He has a background in mining geophysics and extensive experience in mineral exploration worldwide. Prior to starting OFG, he was chief geophysicist for Placer Dome, the second largest gold mining company in the world, at that time. Peter has a strong background in electrical, magnetic, and electromagnetic potential field methods used in mineral exploration and in the economic evaluation of mineral deposits.

Abstract:
Subsea cables can be divided into several classes – DC Power, AC Power, or communication with or without repeaters. Their magnetic signatures can be quite strong and they are distinct. There is considerable incentive to measure the depth of burial of AC power cables; they can overheat if buried too deeply, and are susceptible to damage if buried too shallowly. The magnetic signature measured when using a vector magnetometer is different from that seen using a total field magnetometer and extra information can be extracted using a vector magnetometer. The measurement of electric fields around subsea cables is not typical, but this can provide complementary and quite useful information, particularly when looking for faults. A brief discussion of theory and some example data collected during surveys is presented. Examples of data collected using an active seafloor following tow-fish (ROTV) and using an Autonomous Underwater Vehicle (AUV) are shown. An example illustrating how the depth of burial over an AC power cable can be readily measured using a high speed vector magnetometer is presented.