Don't Panic Geocast

It's not an exact science.

About the show

John Leeman and Shannon Dulin discuss geoscience and technology weekly for your enjoyment! Features include guests, fun paper Friday selections, product reviews, and banter about recent developments. Shannon is a field geologist who tolerates technology and John is a self-proclaimed nerd that tolerates geologists.


  • Poster Image

    Episode 343 - "Div, Grad, and Curl"

    September 23rd, 2022  |  53 mins 7 secs

    Vector calculus is the basis of many analysis techniques, but it does not need to be complicated!

  • Poster Image

    Episode 342 - "Kiss Me"

    September 9th, 2022  |  51 mins 57 secs

    How do we remember all of the sequences, facts, and processes in our fields? Mnemonic devices! This week we chat about a few of our favorites.

  • Poster Image

    Episode 341 - "Scrambler Outside the Physics Department"

    September 2nd, 2022  |  40 mins 35 secs

    Fake forces! This week we talk about what they are and why you seem to feel them if they are only apparent.

  • Poster Image

    Episode 340 - "Coriolis Thing"

    August 26th, 2022  |  1 hr 3 mins

    This week we talk about why the Coriolis force is a fictitious force and what it does to balance pressure gradients in the atmosphere.

  • Poster Image

    Episode 339 - "Museum with a crater out back"

    August 19th, 2022  |  44 mins 26 secs

    This week we talk about meteor crater and about the little blue pill.... or red pill.

  • Poster Image

    Episode 338 - "GEARS 2022"

    August 12th, 2022  |  1 hr 1 min

    The GEARS workshop just happened again, hear what we saw, what the students did and more!

  • Poster Image

    Episode 337 - "Air Guitar"

    July 22nd, 2022  |  28 mins 56 secs

    The summer shorts musical theme continues with sferics and another paper from the BMJ Christmas edition!

  • Poster Image

    Episode 336 - "Chopstick Breaking Sound"

    July 15th, 2022  |  41 mins 18 secs

    This week we talk about sounds from the Aurora and strange atmospheric conditions that create it.

  • Poster Image

    Episode 335 - "Fish with a Ray Gun"

    July 1st, 2022  |  26 mins 19 secs

    We stick with our musical theme for summer shorts and talk about singing ice! Also why is it important to be stupid as a scientist?

  • Poster Image

    Episode 334 - "Rock Concert"

    June 24th, 2022  |  30 mins 22 secs

    Our musical themed summer shorts continue with the phenomena of ringing rocks! Also, can math get you out of that failure to stop ticket?

  • Poster Image

    Episode 333 - "Sandphony"

    June 10th, 2022  |  25 mins 50 secs

    This week we talk about singing sands and how on Earth dunes make noise.

  • Poster Image

    Episode 332 - "Caliche"

    June 3rd, 2022  |  26 mins 52 secs

    We kick off summer shorts by talking about caliche and ways it makes new field geologists crazy!

  • Poster Image


    May 20th, 2022  |  1 hr 33 mins

    This week Dr. Ryan May joins us to talk about life as a scientific software developer and his career path from radars to radiosondes and more!

  • Poster Image

    Episode 330 - "Blamo"

    May 13th, 2022  |  1 hr 5 mins

    Last week we talked about material hardness, but what about when materials crack and fracture? This week we talk about fracture toughness.

  • Poster Image

    Episode 329 - "Granite Annulus"

    May 6th, 2022  |  1 hr 3 mins

    What makes a material hard? What makes it tough? Are they the same thing?

  • Poster Image

    Episode 328 - "Bouma"

    April 22nd, 2022  |  56 mins 23 secs

    This week we talk about the famous Bouma sequence in more detail and look at where the world of quantum physics could have been in a parallel universe.