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Jackie Clark

@geojackjack

Asst. Research Scientist at UMD, avgeek, gardener, parent & occasional rock licker. Will take strike & dip measurements for fun. Opinions expressed are solely my own.

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13.10.2023
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Latest posts by Jackie Clark @geojackjack

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New NASA DART Mission Data Reveals that Asteroids Throw ‘Cosmic Snowballs’ at Each Other | College of Computer, Mathematical, and Natural Sciences | University of Maryland Astronomers found evidence that rocks continuously travel between Didymos and its smaller moon Dimorphos, reshap

Astronomy's Jessica Sunshine and Tony Farnham discovered surprising asteroid behavior after analyzing NASA's #DARTMission data ☄️

The team found fan-shaped streaks on the asteroid moon Dimorphos' surface—the first visual evidence of rocks and dust naturally traveling between asteroids. 🔭

06.03.2026 17:37 👍 9 🔁 5 💬 0 📌 0

Looking at your profile pic in smaller form, it now looks like Cookie Monster.

06.03.2026 02:17 👍 1 🔁 0 💬 1 📌 0

Same view, but make it 3D

To go 3D: eyes' lines of sight parallel, left image for left eye, right image for right eye.

#Mars 🧪🔭

📷 areo.info/mars20/ecams... @areoinfo.bsky.social

05.03.2026 19:47 👍 41 🔁 12 💬 0 📌 2
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Fault Reactivation by Fluid Injection: Controls From Stress State and Injection Rate Effective stress principle only applies if fluid pressure is homogeneous High injection rate and high stresses enhance in-plane fluid pressure heterogeneity At high injection rate, high localized f...

Fault reactivation would be my first thought.
Often waste water injection is done in layers that are poorly mapped or calibrated leading to large variations in local pressures.
There is some debate on which mechanism of fault reactivation though..

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

05.03.2026 20:14 👍 5 🔁 3 💬 0 📌 0

Like-Follow-Subscribe for more really dumb geology jokes

05.03.2026 15:50 👍 27 🔁 5 💬 6 📌 0
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a man wearing a red bandana and a black tank top is talking into a microphone and smoking a cigarette . ALT: a man wearing a red bandana and a black tank top is talking into a microphone and smoking a cigarette .
05.03.2026 15:54 👍 2 🔁 0 💬 0 📌 0

This does not look good for GEO majors missing out on core courses.

04.03.2026 21:23 👍 5 🔁 0 💬 0 📌 0

Are you standing up for Science on Saturday? Our nearest rally is at Michigan State Capitol!

03.03.2026 20:46 👍 25 🔁 7 💬 1 📌 0

Snow is sticking to cars and bushes in College Park now. Roads are just wet.

02.03.2026 19:51 👍 11 🔁 2 💬 0 📌 0

Beautiful snow flurries on UMD's campus for the last 30 mins.

02.03.2026 17:53 👍 0 🔁 0 💬 0 📌 0

Follow-up comment on how bad it is on the ground at NASA Goddard Space Flight Center. 🔭

02.03.2026 15:51 👍 39 🔁 26 💬 0 📌 3

NASA is making big changes to the Artemis program!

27.02.2026 17:10 👍 0 🔁 0 💬 0 📌 0

Gasp! This is a shocker. #artemisIII #nasa

27.02.2026 15:41 👍 0 🔁 0 💬 0 📌 0

Yes!

27.02.2026 12:28 👍 0 🔁 0 💬 0 📌 0

But, I like drinking pine trees! Leave the IPAs to me!

27.02.2026 02:14 👍 1 🔁 0 💬 1 📌 0
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2026 NASA Planetary Science Summer School (PSSS) Pre-application Webinar Register here to get access to the PSSS Pre-application Webinar on Wednesday, March 4, 2026 at 2:30 - 3:30 PM Pacific Time. In this webinar, you'll hear a description of the PSSS program, and learn b...

I learn that the NASA Planetary Science Summer School on spacecraft mission planning will be taking place this year, amid everything else that is happening.

The pre-application webinar is on 2026 March 4:

docs.google.com/forms/d/e/1F...

26.02.2026 02:20 👍 13 🔁 7 💬 0 📌 1

Ooooooooooo!!

26.02.2026 01:47 👍 0 🔁 0 💬 0 📌 0

I also need more deets about the pop tarts!

25.02.2026 17:52 👍 1 🔁 0 💬 0 📌 0
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A New Global Perspective on Recent Tectonism in the Lunar Maria A New Global Perspective on Recent Tectonism in the Lunar Maria, Nypaver, C. A., Watters, T. R., Banks, M. E., Clark, J. D., Frueh, T.

New publication by Nypaver et al can be found here: iopscience.iop.org/article/10.3...

25.02.2026 14:48 👍 2 🔁 0 💬 0 📌 0
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Moonquakes: Understanding the Moon's Tectonic Forces Could Protect Future Astronauts Space agencies and companies looking to set up lunar outposts should build far away from seismic activity.

Recent tectonism and hazards, OH MY! @cnet.com www.cnet.com/science/unde...

25.02.2026 14:46 👍 3 🔁 0 💬 1 📌 0
Liquefaction Unit Supervisor Looking to make a difference? Join our strong and mighty workforce. We offer benefits and growth opportunities and impact the lives of millions of Californians.

The Liquefaction Unit Supervisor will be responsible for managing the Liquefaction Zoning Unit. calcareers.ca.gov/CalHrPublic/...

24.02.2026 01:10 👍 9 🔁 6 💬 1 📌 1
Post image

We have some really, really cool photos of the Moon.

This is one—of Malapert massif, one of the candidate Artemis III landing sites.

Taken from an oblique angle by the Lunar Reconnaissance Orbiter Camera on 3 March 2023, the image is about 50 km across in the foreground.

Credit: NASA/GSFC/ASU

24.02.2026 20:54 👍 140 🔁 20 💬 2 📌 0
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Looking for life purpose? Start with building social ties Research shows that having a sense of purpose can lower stress levels and boost our mental health. Finding meaning may not have to be an ambitious project.

Research shows that having a sense of purpose can lower stress levels and boost our mental health. Finding meaning may not have to be an ambitious project.

22.02.2026 19:03 👍 250 🔁 46 💬 4 📌 2

Both winning goals by the women's and men's USA hockey teams were by Michiganders! #puremichigan #TeamUSA #hockey #michigander

22.02.2026 16:03 👍 3 🔁 0 💬 0 📌 0

YOOOOOOOOOOOOO!!!

22.02.2026 15:54 👍 1 🔁 0 💬 0 📌 0

Honestly, they're both great teams. Equally deserve gold.

22.02.2026 15:50 👍 1 🔁 0 💬 0 📌 0

That little blip on the east side of DC makes me chuckle.

22.02.2026 15:48 👍 0 🔁 0 💬 0 📌 0

Also, regardless of the outcome, Hellebuyck needs an award for blocking double the amount of shots. Canada isn't messing around. The US team needs to refocus and take more shots.

22.02.2026 15:43 👍 0 🔁 0 💬 0 📌 0

I'm not surprised they're going into OT

22.02.2026 15:32 👍 1 🔁 0 💬 1 📌 0

I just noticed Hellebuyck's helmet has MI on the back. Hell ya, Michiganders! #TeamUSA #hockey #puremichigan

22.02.2026 15:10 👍 2 🔁 0 💬 1 📌 1