Hi All,

What brand of generators are some of you using for your IP survey generators? I was pricing some and just curious, Honda seems to be the go to. Cheers

Episode 51 of the Halemaʻumaʻu summit eruption, July 15th 2026. Peak fountain: 950 feet (290 m) from north vent. Peak effusion: ~300 m³/s. Plume: 5,500 m ASL by radar. Duration: 8.3 hours.

Two geophysically notable observations:

First — the HVO tiltmeter forecasting model developed by Ingrid Johanson failed three consecutive forecast windows before Episode 51. Windows July 6–12, July 11–13, and July 13–15 all showed precursory inflation and spattering followed by deflation without fountaining. Fifty accurate predictions — then three consecutive failures in two weeks.

Second — the south vent showed only flames and gas jets during Episode 51. No lava fountaining. Conduit reorganization is a possible interpretation, consistent with behavior observed at Puʻu ʻŌʻō before its transition from episodic to continuous eruption in 1986.

Deflation from Episode 51: episode ended 4:46 p.m. HST. Re-inflation underway.

DOI reference for episodic eruption forecasting methodology: USGS/HVO

Full breakdown:

https://youtu.be/CmMhyiC0LBQ?si=byo_gAAnQMX7jt8z

I found it in a Chinese market delivery app, i really want only for fun and love to exploration geophysics but idk

I have an interview with shearwater on teams. what things should i look out for please.

Study published in Journal of Geophysical Research: Solid Earth (June 2026) modeled stress accumulation along the southern San Andreas and San Jacinto fault systems using a physics-based earthquake cycle model.

Key findings:

- San Jacinto Bernardino segment: 3.6 megapascals — highest in the 1,000-year reconstruction

- San Andreas Mojave South: 2.8 megapascals — above its previous recorded peak

- Both segments simultaneously at high stress — the configuration that historically preceded through-going ruptures at Cajon Pass

"That is the configuration we are approaching today." — Burkhard, lead author

Projected joint rupture magnitude: M7.4–7.8

DOI: 10.1029/2025JB032483

Full breakdown: https://youtu.be/QS-WErtbDNQ?is=4RZ8T1G-yiIw4G7a

Hello everyone, I'm a geology student and I'm doing my thesis using gravimetry to estimate the geometry of a pluton. The problem is that during the data collection campaign, they didn't use differential GPS, so the uncertainty in the elevation data is high. Any recommendations? Similar cases?

Anyone else old enough to remember using photocopied texts like this classic? These were handed down by graduates to the next generation.

Hi everyone,

I have been developing a fast 3D inversion solver for TEM/TDEM data and am now looking for real-world cases to test it on.

The current approach is designed for models with a layered 1D background and 3D anomalies, particularly conductive targets, but it can be extended to more general geometries, including topography and different survey configurations.

I am interested in connecting with geophysicists, exploration companies, or anyone working with TEM/TDEM data who might be interested in testing the solver on a real case.

In particular, I would like to:

• test the solver on real datasets,
• compare the results with existing inversions or known geology,
• understand the main limitations of current 3D TEM inversion workflows,
• and learn what would be needed to turn this solver into a genuinely useful practical product.

I can already perform inversions, so if you have an interesting dataset, a challenging 3D case, or simply experience with current TEM inversion tools, I'd be very happy to connect.

Feel free to comment or send me a a direct message.

https://wave.syshuman.com

Enjoy

Just wondering if wearing a one of those milwaukee heated jackets would effect an EM sensor?

I’m looking for a good 3D seismic shot-gather dataset that can be used for Full-Waveform Inversion (FWI) experiments, including 3D shot gathers or raw/preprocessed seismic data, velocity model, density, or other ground-truth/reference model if available, something suitable for acoustic or elastic FWI testing. I know about 2D examples like Marmousi, but I’m specifically looking for 3D datasets that are practical for testing FWI workflows. Does anyone know good public datasets, or research repositories for this?

The Biscuit Basin explosion on June 13th, 2026 is the closest hydrothermal explosion ever recorded to an instrumented monitoring station in Yellowstone's history. Seismic and infrasound data were captured in real time.

No precursor signal was flagged before the event. YVO scientists are currently combing through the full record specifically searching for any signal that preceded the explosion.

That answer — confirmed precursor or none — has direct implications for how hydrothermal systems across the park get monitored going forward. A new monitoring station is being installed in Upper Geyser Basin this month.

Source: USGS/YVO

Full breakdown: https://youtu.be/wO9OWmAbaEI?is=mm45Wh4pmCLokG96

Hello everyone,

I want to generate groundwater potential map for my study area using ML. I have well locations but i don't have non well locations. And i am skeptical about this concept of non well or pseudo absence. Can anyone please help me with how to proceed with this problem?

Examples: Sharpe SE300 (specifically in the Crone shoot back config) or a Scintrex SE-600; an original APEX Parametrics MaxMin; a Geonics EM15, EM17 or EM17L; a MxPhar VHEM; ABEM Minigun, Demigun, or EMgun; equivalents from other manufacturers from the 60s and 70s. Any Geonics fdem instruments predating the mk2 units (which we have).

Our company (Inductyne) is building some new fdem instrumentation from first principles. But I've also been building a historical library and museum as tribute to those that came before. Standing on the shoulders of giant, and such.

Currently on display: MaxMin II (pristine); Geonics EM16 (ugly), EM38 (the wood one), and a Scintrex coil of unknown provenance which we suspect is from an SE-600 but aren't really sure.

Willing to pay for shipping and barter beers at conferences.

The June 26 earthquake hit Fujikawaguchiko at a depth of 20.3km. Four earthquakes struck the greater Tokyo region in eleven days.

The geophysical detail worth noting: a 2012 NIED study measured magma chamber pressure beneath Fuji at 1.6 megapascals — sixteen times the estimated threshold that preceded the 1707 Hōei eruption, which followed a major earthquake by 49 days.

JMA's advisory window covered immediate seismic follow-up. The magma pressure data operates on a completely different timescale — and that's the question the official communications didn't address.

Full breakdown of the mechanism, the 1707 precedent, and the monitoring variables: https://youtu.be/l0A7xswu1sM?is=4f044YL2h9h1oLAh