Prominence Energy Satellite Study Maps Helium and Hydrogen Anomalies at Eyre

Satellite study highlights widespread gas anomalies across Eyre helium and hydrogen project

The Prominence Energy Eyre Project satellite study finds helium hydrogen and methane anomalies across a project area that could represent a significant early-stage exploration opportunity. Prominence Energy Ltd (ASX: PRM) has reported results from an independent satellite-based spectral analysis that has mapped numerous helium, natural hydrogen and methane anomalies across its Eyre Helium and Hydrogen Project in South Australia.

According to the ASX announcement dated 24 June 2026, these anomalies occur across both granted and pending licence areas and are reported to align with results from a recent soil gas survey, providing multiple lines of technical support for an active subsurface gas system and helping advance targets toward drilling.

"These results further strengthen confidence in the prospectivity of the Eyre Project and our understanding of the geological processes operating across the project area. The alignment between independently derived satellite results and in-house soil gas datasets is particularly encouraging. Several spectral anomalies support existing targets and occur adjacent to locations where elevated hydrogen, helium and methane concentrations were measured during our recent soil gas survey.

As we integrate these results with geological mapping and soil gas data, we continue to refine and de-risk our exploration portfolio. The widespread distribution of anomalies supports our view that the Eyre Project may host a large-scale natural hydrogen and helium system and reinforces its position as a highly prospective early-stage exploration opportunity," said Dr Krista Davies, Chief Operating Officer of Prominence Energy Ltd.

What the independent satellite study found

According to Prominence Energy Ltd, the satellite spectral analysis, completed by remote sensing specialist Dr Neil Pendock, has delivered several key points for the Eyre Project:

• Numerous anomalies associated with helium, natural hydrogen and methane have been mapped across the project area.
• Anomalies are present across both granted and pending licence areas, which is interpreted by the company as being consistent with a potentially regional-scale natural gas system.
• Several of the strongest anomalies occur close to soil gas survey sites where elevated hydrogen, helium and methane concentrations were previously reported (ASX announcement 7 May 2026).
• Additional prospective areas not previously prioritised have been highlighted for follow-up work.

For investors, this means Prominence Energy Ltd is reporting that its target list at Eyre has expanded, while some existing targets now have support from an additional, independent dataset.

Why does alignment of datasets matter?

According to the company, one of the most material aspects of the announcement is the convergence of independent datasets on similar locations:

1. Soil gas survey data have already reported elevated gas concentrations at the surface.
2. Satellite spectral data independently identify surface anomalies that the study interprets as consistent with gas seepage.
3. Both datasets point to overlapping areas that Prominence Energy Ltd considers priority zones for further work.

In exploration, this type of multi-dataset overlap is commonly used to reduce technical uncertainty prior to drilling. It does not confirm the presence of commercial accumulations, however, it can help focus capital on the most technically supported locations.

How the satellite spectral analysis works

Sentinel‑2 and spectral anomaly mapping

The independent study used Sentinel‑2 satellite imagery. Sentinel‑2 is an Earth observation satellite operated by the European Space Agency that collects images of the Earth in multiple narrow bands of light, including parts of the spectrum that are not visible to the human eye.

Dr Pendock's work, as described in the ASX announcement, applied an optical turbulence model using:

• Visible Near Infrared (VNIR) bands, which in this study were used to look for surface features consistent with hydrogen and helium-related changes.
• Shortwave Infrared (SWIR) bands, which were used to assess signatures consistent with methane-related surface expressions.

In practical terms, when gases migrate from depth toward the surface, they can influence soil chemistry and, in some environments, vegetation health or moisture. These subtle changes can alter how the surface reflects light. By processing these data, specialists can consequently identify spectral anomalies — areas where the reflectance pattern differs from the background in a way that may be consistent with gas seepage.

From spectral data to prospectivity maps

According to Prominence Energy Ltd, the satellite datasets were used to produce regional gas prospectivity maps for helium, natural hydrogen and methane. These maps group anomaly strength into categories such as Low, Moderate, High and Very High, based on thresholds selected from continuous colour scales.

The ASX announcement explains that these labels were assigned qualitatively to highlight relative differences in anomaly strength, rather than absolute gas concentrations. For investors, this means the satellite work does not measure gas volumes or grades. Instead, it provides screening maps that help the company decide where to focus more detailed ground-based exploration and, eventually, drilling.

Key features of the method for investors

These characteristics support Prominence Energy Ltd's approach of using low-cost, early-stage methods to build a technical case prior to committing to drilling.

Multiple independent datasets converging on priority targets

The ASX announcement emphasises that the satellite study is part of a broader technical workflow for the Eyre Project. Furthermore, Prominence Energy Ltd is combining several distinct data streams:

• Soil gas survey results: On-ground samples where hydrogen, helium and methane were reported at elevated levels.
• Satellite spectral analysis: Regional maps showing helium, hydrogen and methane anomaly patterns.
• Gravity and magnetic interpretation: Geophysical datasets that can help infer density and magnetic contrasts in the subsurface, often used to map basin architecture and structural features.
• Structural mapping: Geological interpretation of faults, folds and other features that can influence how gases move and where they might be trapped.

The company states that several satellite anomalies occur adjacent to soil gas locations with elevated gas readings. This neighbour relationship between datasets is interpreted by Prominence Energy Ltd as evidence supporting active gas migration. For investors, the key point is that target definition is no longer based on a single method.

The Eyre Project and regional-scale gas system potential

According to the announcement, anomalies are distributed widely across both granted and pending licence areas at Eyre. The company interprets this as suggesting that the geological processes responsible for gas generation and migration may operate across a larger regional area rather than in a single localised pocket.

From an exploration portfolio perspective, this has several implications:

• The exploration footprint with reported spectral anomalies is not limited to current high-priority targets, but extends into newly highlighted areas.
• Additional prospective areas have been identified that had not been front-ranked prior to this study.
• The presence of anomalies across pending licences indicates that areas still moving through the tenure process also appear prospective based on this dataset.

While the satellite data do not quantify resources, they give Prominence Energy Ltd a broader inventory of locations to investigate with follow-up work.

Next steps: integrating data and advancing toward drilling

Prominence Energy Ltd reports that the satellite analysis will now be merged with other technical datasets at the Gawler Hydrogen Project, which includes the Eyre area. The stated aim is to rank and prioritise exploration targets and prepare a subset for potential future drilling.

According to the ASX announcement, the next steps include:

Progress through this workflow represents a key set of milestones for investors monitoring how quickly Prominence Energy Ltd can move from early-stage screening toward drill-ready prospects.

Educational section: understanding natural hydrogen and helium exploration

What is natural hydrogen?

The ASX announcement describes natural hydrogen (also known as white or geologic hydrogen) as hydrogen gas formed by natural processes within the Earth that accumulates in the subsurface. It is generated by geological reactions, for instance, when certain minerals react with water deep underground.

It can be located using many of the same exploration tools used in oil and gas, such as soil gas surveys, geophysical methods and geological mapping. When hydrogen is used as a fuel, it typically produces water vapour as the main by-product when combusted, meaning it does not emit carbon dioxide at the point of use.

For exploration companies like Prominence Energy Ltd, natural hydrogen represents a geological gas target rather than a manufactured energy product. The early-stage exploration process often focuses on detecting subtle surface indications that gas may be migrating from depth, which is where techniques such as soil gas sampling and satellite spectral analysis are applied.

What is helium and where does it come from?

According to the ASX announcement, helium is a noble gas generated through the radioactive decay of uranium and thorium in very old crustal rocks, especially Archean granites — rocks older than about 2.5 billion years that form part of the Earth's ancient continental crust.

Key helium characteristics include:

• It is non-renewable on human timeframes, as its formation is extremely slow.
• It is essential in medical imaging, particularly MRI scanners, semiconductor manufacturing, and space technologies and cryogenics due to its very low boiling point.
• The market is reported to experience supply constraints from time to time, meaning new geological sources are of considerable interest to industrial gas buyers.

In the context of the Eyre Project, Prominence Energy Ltd is targeting helium generated in ancient crustal rocks that may have migrated into traps in the subsurface, sometimes in association with hydrogen or other gases.

How do remote sensing and soil gas surveys fit into gas exploration?

For early-stage projects, direct drilling of every potential target is usually not cost-effective. Instead, explorers apply a staged approach:

1. Remote sensing (such as Sentinel‑2 spectral analysis) — provides regional-scale screening and highlights areas with spectral responses consistent with gas-related changes at surface.
2. Soil gas surveys — measure gas concentrations in shallow soil or near-surface air and help confirm where gases may be leaking from depth.
3. Geophysical methods (gravity, magnetics, seismic where applicable) — contribute to understanding the subsurface structure and assist in modelling possible reservoirs and migration pathways.
4. Drilling of selected targets — tests whether gas accumulations are present and in what quantities, providing data on gas composition, pressure and reservoir properties.

Prominence Energy Ltd is currently progressing through the first three steps, with the independent satellite study and prior soil gas survey forming part of this staged evaluation.

Investment context: Prominence Energy Ltd and the Eyre results

Prominence Energy Ltd positions itself, according to the ASX announcement, as an energy company focused on very high ROI opportunities that can be secured at an early stage and at close to what it describes as "ground floor" valuations. Its portfolio covers conventional oil and gas, helium, green energy and clean hydrogen opportunities.

For investors assessing the Eyre Helium and Hydrogen Project:

• The satellite study adds an independent, low-cost dataset that aligns with prior soil gas work.
• The reported regional distribution of anomalies suggests that the company sees a project-scale, potentially regional system rather than a single isolated prospect.
• The integration of satellite, geophysical and geochemical data is aimed at moving from concept-level appraisal toward ranked, drill-ready targets.

While the current announcement remains focused on technical and early-stage exploration outcomes rather than resource figures or economic studies, it provides further detail on how Prominence Energy Ltd is building its case for drilling across the wider Gawler Hydrogen Project area. The Prominence Energy Eyre Project satellite study finds helium hydrogen and methane anomalies that, in combination with prior datasets, offer a strengthened foundation for advancing this project toward the drill bit.

Glossary of key terms

• Natural (white or geologic) hydrogen: Hydrogen gas formed by natural geological processes within the Earth and accumulated underground, rather than produced industrially.
• Helium: A noble gas created mainly by radioactive decay in ancient rocks, with critical uses in MRI machines, semiconductor plants, space technologies and cryogenics.
• Sentinel‑2: A European Space Agency satellite that collects multi-spectral images of the Earth's surface, used for environmental, agricultural and geological studies.
• VNIR (Visible Near Infrared): Part of the electromagnetic spectrum that includes visible light and nearby infrared wavelengths, used in this study to assess hydrogen and helium-related features.
• SWIR (Shortwave Infrared): A part of the spectrum beyond VNIR, applied in this study to identify methane-related surface expressions.
• Spectral anomaly: A deviation in how the surface reflects light, compared with the surrounding area, that may indicate differences in material, moisture or chemistry, including possible gas-related effects.
• Soil gas survey: A method where shallow soil or near-surface gases are sampled and analysed to detect trace amounts of gases such as hydrogen, helium or methane.
• Archean granite: Very old granite rocks, typically older than 2.5 billion years, often associated with helium generation through long-term radioactive decay.

Want to Learn More About Prominence Energy's Eyre Helium and Hydrogen Project?

With multiple independent datasets now converging on priority targets across the Eyre Project, Prominence Energy Ltd (ASX: PRM) is steadily advancing what it believes could be a large-scale natural hydrogen and helium system in South Australia. As the company moves toward integrating satellite, geophysical and geochemical data ahead of potential drilling, investors seeking to understand the full scope of the opportunity — including the broader Gawler Hydrogen Project portfolio — can explore further at www.prominenceenergy.com.au.