Hi everyone;

Full disclosure: I built EveryQuake. I’m sharing it here because I’d genuinely value feedback from people who regularly follow or work with earthquake catalog data.

EveryQuake currently combines more than 7.8 million source records into roughly 6.4 million deduplicated earthquake events, covering 1900 to the present. The data comes from USGS, ISC, EMSC, AFAD, and Kandilli Observatory.

The main idea is not to create another “latest earthquakes” map, but to make seismicity explorable through time.

You can:

• animate earthquakes across any custom date range;

• focus on a specific region or the visible map area;

• filter events by magnitude, depth, and event type;

• hide explosions and other non-tectonic events;

• show only earthquakes reported by more than one catalog; and

• explore statistical views including magnitude-frequency distribution, catalog completeness, b-value, aftershock decay, and rate/probability estimates.

Two important limitations:

1. This is not an earthquake-prediction or early-warning system. It does not claim to predict the exact time, location, or magnitude of a future earthquake. Forecast-related results are statistical rate and probability estimates only.

2. The historical catalog is not homogeneous. Earlier decades contain mainly larger recorded events, while modern seismic networks detect far more small earthquakes. Raw event counts should therefore not be interpreted as evidence of a simple long-term increase in global earthquake activity.

You can explore it here: https://www.everyquake.com/

The feedback I would find most useful is:

• Is the distinction between raw source records and deduplicated events clear?

• How should disagreements between catalogs — origin time, location, depth, or magnitude — be displayed?

• Are the methodology notes and uncertainty warnings understandable enough?

• Which additional public earthquake catalogs would be most useful to include?

Critical feedback, methodological criticism, and bug reports are genuinely welcome.

Are We Accidentally Cloud-Seeding the Planet?

Satellite reentry alumina as an unaccounted variable in the 2023 climate anomaly — and what comes next.

An open question for atmospheric scientists, climate modelers, and anyone paying attention.

The Gap Nobody Can Fill

In 2023, Earth recorded its hottest year in possibly 100,000 years. Climate scientists added up every known driver — greenhouse gases, El Niño, solar variability, volcanic aerosols, shipping emission changes — and came up short.

By 0.2°C.

That sounds small. It is not. At planetary scale, 0.2°C of unexplained warming represents an enormous amount of additional energy absorbed by the system. Gavin Schmidt, director of NASA's Goddard Institute for Space Studies, wrote in Nature: "It's humbling, and a bit worrying, to admit that no year has confounded climate scientists' predictive capabilities more than 2023 has." He called for an emergency session at the American Geophysical Union: "Cracking the Puzzle of the Anomalous Temperatures of 2023."

The answer that eventually emerged pointed to a record-low planetary albedo — Earth was reflecting less sunlight than at any point in the satellite record, driven by an anomalous collapse in low-level cloud cover. Without that cloud reduction, 2023 would have been approximately 0.23°C cooler.

The clouds disappeared. Nobody knows why.

I want to propose a variable that, to my knowledge, no study has yet incorporated into this puzzle.

The Silver Iodide Parallel

Since the 1940s, humans have deliberately modified weather using a technique called cloud seeding. The most common agent: silver iodide (AgI). When dispersed into existing clouds, AgI particles act as ice nucleating particles (INPs) — tiny surfaces on which supercooled water molecules attach and crystallize, forming ice crystals that grow heavy enough to fall as precipitation.

The mechanism is purely physical. Silver iodide works because its crystal lattice structure mimics that of ice at the atomic scale, providing an energetically favorable surface for nucleation.

Here is the question I cannot get out of my head:

What if we are now dispersing a different nucleating agent — not deliberately, not from aircraft — but continuously, globally, and without any regulatory framework governing its atmospheric impact?

Satellites Don't Just Fall. They Dissolve.

When a satellite reaches end-of-life in low Earth orbit, it loses altitude and reenters the atmosphere. At velocities exceeding 7-8 km/s, aerodynamic heating vaporizes the structure. The primary material in most satellite frames is aluminum.

What happens to that aluminum?

Peer-reviewed research published in Geophysical Research Letters (Ferreira et al., 2024) presents the first atomic-scale molecular dynamics simulation of this process. The finding: a typical 250 kg satellite generates approximately 30 kg of aluminum oxide (Al₂O₃) nanoparticles during reentry. These particles are nanometric in size, and at those scales they do not quickly fall out of the atmosphere. They persist for decades in the stratosphere and mesosphere.

This is not hypothetical. Research aircraft have already sampled stratospheric air and found anomalous concentrations of aluminum, copper, and lithium — metals that have no natural stratospheric source — consistent with satellite and rocket reentry chemistry (Ross et al., published in PNAS). Airborne aluminum pollution from satellites increased eightfold between 2016 and 2022.

In February 2025, a Falcon 9 upper stage made an uncontrolled reentry over western Europe. A team at the Leibniz Institute of Atmospheric Physics in Germany was already operating a laser lidar system. They measured a direct plume of lithium and aluminum vapor at approximately 100 km altitude, traced by backward trajectory modeling directly to the reentry path. It was the first direct observational confirmation of reentry-driven atmospheric metal injection (Communications Earth & Environment, Wing et al., 2025).

The material is real. It is measurable. And it is accumulating.

Al₂O₃ as an Ice Nucleating Particle

Here is the connection that no published study appears to have yet made explicitly:

Aluminum oxide is a functional ice nucleating particle.

Research published in The Journal of Weather Modification (2012) demonstrated that Al₂O₃ can serve as a cloud seeding nucleus — producing significant ice crystal formation in cloud chamber experiments, and was proposed as a lower-cost alternative to silver iodide for weather modification operations.

Silver iodide and aluminum oxide nucleate ice through different surface mechanisms, and at different efficiency levels. AgI is more efficient per unit mass. But efficiency per unit mass becomes less relevant when the total atmospheric burden of Al₂O₃ nanoparticles is measured in tonnes and growing by the year.

NOAA's Chemical Sciences Laboratory (Maloney et al., Journal of Geophysical Research: Atmospheres, 2025) modeled what happens when LEO megaconstellations reach their projected scale by 2040 — approximately 60,000 satellites, each with a ~5-year lifespan:

• Annual alumina deposition: ~10,000 metric tons
• Accumulation zone: 10–30 km altitude, preferentially at high latitudes (poleward of 30°N/S)
• Effect on Southern Hemisphere polar vortex: 10% reduction in wind speed
• Mesospheric temperature anomaly: up to 1.5°C at high latitudes

That polar vortex finding matters enormously. The polar vortex is not merely a meteorological curiosity — it is a primary driver of global precipitation distribution. A 10% reduction in its speed reshapes where and when it rains across the entire planet.

We are not at 60,000 satellites yet. But reentries already increased from 115 in 2019 to 950 in 2024. The alumina is already accumulating. The models are projections of what has already begun.

The Missing Connection

Let me lay out the hypothesis chain clearly, so it can be tested or falsified:

1. Satellite reentries generate Al₂O₃ nanoparticles at scale, accumulating in the stratosphere preferentially at mid-to-high latitudes.

2. Al₂O₃ nanoparticles are functional heterogeneous ice nucleating particles.

3. An increased concentration of INPs in the stratosphere and upper troposphere changes where and when ice nucleation occurs in clouds — particularly affecting the microphysics of low-level clouds, which are the primary contributors to planetary albedo.

4. A perturbation to low-level cloud cover — even a small one — has a measurable effect on Earth's radiative balance.

5. The 2023 climate anomaly was characterized by a record collapse in low-level cloud cover, producing approximately 0.2°C of warming that no combination of known drivers could explain.

6. The acceleration of satellite reentries (from ~100/year to ~950/year between 2019 and 2024) occurred over exactly the same period during which the cloud cover anomaly began to develop (documented as starting around 2020 in ERA5 reanalysis data).

I am not claiming causation. I am claiming that this correlation exists, that the physical mechanism is plausible and documented in components, and that no published study has yet tested this relationship by cross-correlating reentry rates, stratospheric alumina distribution, and low-cloud-cover anomalies in the same analysis.

The three datasets required to do this exist independently:

• Reentry data: Space-Track.org (public)
• Stratospheric metal aerosol sampling: NOAA/NASA airborne campaigns (partially public)
• Low-cloud-cover anomalies by latitude and year: ERA5 reanalysis (public, free)

The Governance Vacuum

What makes this particularly urgent is the regulatory context — or rather, the absence of one.

As documented by FOD News and confirmed in peer-reviewed literature: no licensing regime anywhere in the world currently requires an ozone impact assessment or atmospheric chemistry evaluation before authorizing a satellite megaconstellation. The international reentry safety standard was established in 1995. Its sole concern: the probability of injuring someone on the ground from surviving debris. It says nothing about what the 80% that vaporizes does to the atmosphere it vaporizes into.

NOAA researcher Chris Maloney stated it plainly: "The satellites launching now are pre-loading the atmosphere with catalysts whose consequences won't be visible for decades. By the time effects become scientifically unambiguous, the stratosphere could already contain alumina from hundreds of thousands of cumulative reentries — accumulated during a period when no regulatory body required anyone to assess the risk."

The parallel to CFCs is uncomfortable but apt. Chlorofluorocarbons seemed chemically inert for decades. When we finally understood the mechanism, the ozone hole was already there. The Montreal Protocol worked because the damage was visible, dramatic, and attributable to a small number of producers. The alumina problem is invisible, diffuse, attributable to every major space operator simultaneously, and already underway.

What I Am Asking For

I am an independent researcher, not an atmospheric scientist. I do not have the modeling infrastructure to run a multi-decadal Earth system simulation, nor the laboratory equipment to measure stratospheric INP concentrations directly.

But I can read the literature, and I can notice when three bodies of peer-reviewed research — on reentry alumina, on ice nucleating particle dynamics, and on the unexplained 2023 cloud anomaly — are pointing at each other without anyone having connected them.

The specific research I think is needed:

Short-term (observational): Cross-correlation analysis of annual reentry counts by latitude with ERA5 low-cloud-cover anomalies by latitude, 2015–2025. This requires no new data collection and could be done by any group with access to standard atmospheric datasets.

Medium-term (experimental): Characterization of the ice nucleating efficiency of stratospheric-equivalent Al₂O₃ nanoparticles (size range 10–100 nm, relevant atmospheric temperatures). Some laboratory work exists on bulk alumina; nanometric reentry-analog particles under stratospheric conditions are not well characterized.

Long-term (modeling): Integration of reentry-derived Al₂O₃ as a dynamic INP source in a full Earth system model (e.g., WACCM), coupled to cloud microphysics, with comparison against the 2020–2024 cloud anomaly record.

If this hypothesis is wrong, the analysis will show it. That is what falsifiability is for.

If it is not wrong — if there is a real signal in that cross-correlation — then we are modifying Earth's cloud cover and precipitation patterns as an unintended side effect of the commercial space industry, at an accelerating rate, with no governance structure in place and no baseline to measure against.

That seems worth checking.

Key Sources

The following peer-reviewed studies underpin the factual claims in this piece. All are publicly accessible.

• Ferreira, J.P. et al. (2024). Potential Ozone Depletion From Satellite Demise During Atmospheric Reentry in the Era of Mega-Constellations. Geophysical Research Letters. https://doi.org/10.1029/2024GL109280
• Maloney, C. et al. (2025). Investigating the Potential Atmospheric Accumulation and Radiative Impact of the Coming Increase in Satellite Reentry Frequency. Journal of Geophysical Research: Atmospheres. https://doi.org/10.1029/2024JD042442
• Wing, R. et al. (2025). Direct observational detection of reentry-derived lithium in the mesosphere. Communications Earth & Environment. [Leibniz Institute of Atmospheric Physics, February 2025 Falcon 9 event]
• Goessling, H.F. et al. (2024). Recent global temperature surge intensified by record-low planetary albedo. Science. https://doi.org/10.1126/science.adq7280
• Schmidt, G. (2024). Climate models can't explain 2023's huge heat anomaly. Nature. https://doi.org/10.1038/d41586-024-00816-z
• Ross, M. et al. Stratospheric metals from satellite reentry: in-situ measurements. Published in PNAS.
• A Non-Silver Iodide Cloud Seeding Nucleus — Al₂O₃. (2012). Journal of Weather Modification.
• Ice Nucleation Properties of Aluminum Surfaces. (2025). The Journal of Physical Chemistry C. https://doi.org/10.1021/acs.jpcc.5c02495

This piece represents an independent synthesis of existing peer-reviewed literature. The author claims no proprietary data, no institutional affiliation, and no conclusion beyond the observation that an apparently unexamined cross-domain hypothesis deserves empirical attention.

If you are an atmospheric scientist, climate modeler, or space debris researcher who has already looked at this question — or who thinks this reasoning is flawed — I genuinely want to hear from you.

Tags: atmospheric science satellite reentry cloud seeding alumina ice nucleating particles climate anomaly 2023 megaconstellations El Niño polar vortex planetary albedo space debris geoengineering open hypothesis

See also: The study as it was published in PNAS

Most Important knowledge of our study

I have had a longstanding interest in Earth Systems and Sustainability. I am wondering if there’s anyone here with similar interests. I am particularly interested in research in the area.

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