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Blog | Advanced Geosciences Inc
Quick Tip: Depth of Investigation for ERI Surveys
Posted by Sean on Apr 15, 2019
You can’t talk about Electrical Resistivity Imaging (ERI) surveys without eventually talking about depth. Aside from resolution, depth of investigation is one of the first talking points our customers want to discuss when considering ERI surveys.
What is depth dependent on in ERI?
First of all, depth of investigation will depend on the largest array span you use during your survey. Array span shouldn’t be confused with survey line length. It’s a common misconception that longer survey lines=more depth or that roll-along=more...
Quick Tips: Electrode Preparation and Removal
Posted by Sean on Apr 10, 2019
We here at AGI are big advocates of saving time. Seriously, if time is money—then we’re serious penny pinchers. That said, we’re always looking to pass on time-saving tips to you! Today we’re showing you a couple of quick tips that can save you a couple of minutes on the field. Particularly, these tips are focused on electrode preparation and removal. You may scoff at saving a few minutes, but here in the Texas sun—a few minutes is the difference between a suntan and sunburn!
Tip 1: Getting the stakes installed correctly will save you troubleshooting...
Typical Ranges of Resistivities for Common Materials
Posted by Sean on Mar 28, 2019
Electrical Resistivity Imaging (ERI) is a fantastic geophysical method for subsurface exploration and delineation (it certainly is our favorite!). In this article, we want to focus more on the “geo” part of geophysics and take a look at some resistivity values for common materials.
You see, ERI works best when you have a good knowledge of the geology of your survey area. In fact, when we’re helping new customers design their survey, or helping someone in the field—the geology of the area is one of our first questions.
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Single-Channel vs Multiple-Channel Systems
Posted by Sean on Mar 26, 2019
Our customers often want to get the most out of our equipment while sticking to their budget. As such, many will opt for a cheaper single-channel system instead of a multiple-channel system. When customers are weighing the options, we often get the question “What’s the difference between the two?”.
The simple answer? Speed.
Of course, there are a few more bells and whistles that a multi-channel system offers, but the key difference is how much faster it is when compared to a single-channel. That’s what we’ll focus on in this...
How will weather conditions affect your geophysical surveys?
Posted by Sean on Mar 21, 2019
In the field, you’ll often find out that Mother Nature isn’t concerned with your project timelines. But whether there’s rain or shine, you’re expected to meet your deadlines. As such, we often get questions from our customers on what kind of weather is reasonable to work in. So in this post, we’ll be listing the weather conditions that pose no problems, conditions that will slow you down, and conditions that will halt your survey completely.
We’ll be discussing how weather affects your survey in general. If you want to learn more about how our...
February 2019 AMA Webinar Hosted by Hasan Aktarakci
Posted by Sean on Mar 08, 2019
This "Ask Me Anything" webinar was hosted by Hasan Aktarakçi on 2.27.2019. Hasan is the Senior Geophysicist and Manager of our Madrid office.
There were several topics covered—all of which were generated by questions from the audience. You can link to each question using the chapters function in the video below. Want to take part in our next webinar? Sign up for webinar alerts from us so that you get an email the next time we host one for your country/time zone.
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February 2019 AMA Webinar Hosted by Jason Greenwood
Posted by Sean on Mar 08, 2019
This "Ask Me Anything" webinar was hosted by Jason Greenwood on 2.20.2019. Jason is the Senior Geophysicist and Manager of our Austin office.
There were several topics covered—all of which were generated by questions from the audience. You can link to each question using the chapters function in the video below. Want to take part in our next webinar? Sign up for webinar alerts from us so that you get an email the next time we host one for your country/time zone.
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December 2018 AMA Webinar Hosted by Eduardo Rodrigues
Posted by Sean on Feb 18, 2019
This Spanish-speaking "Ask Me Anything" webinar was hosted by Eduardo Rodrigues on 12.19.2018. Eduardo is a highly-experienced Geophysicist at our Madrid office.
There were several topics covered—all of which were generated by questions from the audience. You can link to each question using the chapters function in the video below. Want to take part in our next webinar? Sign up for webinar alerts from us so that you get an email the next time we host one for your country/time zone. ...
Customer Spotlight: Conrey Hydrogeology Program | A Rare Look At A Stationary Submerged Marine Survey
Posted by Sean on Feb 14, 2019
One of the coolest applications of resistivity is in the marine environment. Don’t get us wrong, we love solid earth too (it’s our bread and butter after all)—but when you see footage like the video below, you can’t help but be blown away.
Our friend, Matt Becker from the Conrey Hydrogeology Program at California State University Long Beach recently used our passive graphite electrode cables to do a stationary submerged marine survey. As the name...
Our Favorite Sinkhole - The Corvette Cave
Posted by Sean on Feb 11, 2019
Warning—this article contains unsettling images if you’re a Corvette lover.
It may be odd that we here at AGI have a favorite sinkhole. But when you’ve been in the business as long as we have, it would be weird if we didn’t have a favorite sinkhole. As the title of this article suggests, we’re taking a quick look back at a sinkhole known as the “Corvette Cave”.
Early one morning in 2014, a 30-foot-deep sinkhole opened up at the National Corvette Museum in Bowling Green, Kentucky. Thankfully, this was during a time when potentially...
