A Comet Hit the Sun.
Should You Worry?

A YouTube video is going viral claiming "a serious risk of a large impact event." A comet did hit the Sun. The Sun did fire off a barrage of coronal mass ejections. But the data tells a more nuanced story — one of genuine solar activity, impressive space weather, and exactly zero danger to Earth.

Yes, a Comet Hit the Sun

On April 5, SOHO coronagraph imagery captured a Kreutz-group sungrazer comet plunging into the solar corona. These are fragments of a single giant comet that broke up centuries ago — SOHO has observed over 4,000 of them since 1996. They happen roughly every few days.

The comet's interaction with the corona produced two CMEs (734 and 641 km/s), visible in GOES CCOR-1 imagery. But here's the key detail from NASA's DONKI catalog:

The comet made for spectacular imagery. It does not pose any risk to Earth. Sungrazer comets are too small (typically meters to tens of meters) to affect the Sun in any meaningful way — they're gnats hitting a bonfire.

The Real Story: A G2 Storm Hit Earth on April 3

While everyone was watching the comet, the actual space weather event had already happened. On April 2, an M3.5 flare from Active Region 14404 launched a two-part CME (831 + 645 km/s). A high-speed solar wind stream arrived at Earth on April 3, driving genuine geomagnetic activity:

The Kp index hit 6.67 — a G2 moderate geomagnetic storm. That's enough for aurora visible at latitudes as low as New York or Seattle, and measurable degradation of HF radio on polar paths (our paper #82 measured -0.29 dB per storm on polar WSPR corridors).

An M7.5 flare also fired on April 3 — the largest since the X1.5 we tracked on March 29. Nine CMEs were cataloged in 3 days. The Sun is near solar maximum and behaving accordingly.

First Light: Cosmic Ray Forbush Decrease

We deployed neutron monitor ingestion (NMDB — 6 stations from Jungfraujoch to McMurdo) just 48 hours before this storm. And we immediately caught a real signal:

A Forbush decrease occurs when a CME's magnetic field sweeps past Earth, temporarily deflecting galactic cosmic rays. The flux drops 1-5% over 1-2 days, then slowly recovers. All four of our neutron monitor stations show the same pattern: dip on April 3-4, recovery beginning April 5.

This is the first cross-validated space weather detection using our new cosmic ray monitoring system — deployed the day before the storm hit. Sometimes timing is everything.

M-Class Flares and 9 CMEs

The Sun has been firing off flares and CMEs at a rapid clip:

This is what solar maximum looks like. Active regions produce flares, flares launch CMEs, some hit Earth, most don't. The geometry matters more than the violence — a weak CME aimed directly at Earth is more dangerous than a fast one that misses.

The Bottom Line

The Sun is active. That's normal for solar maximum. A G2 storm hit on April 3 — enough for nice aurora, measurable in our WSPR and cosmic ray data, but no infrastructure impact. The sungrazer comet produced dramatic SOHO imagery and two CMEs that are both aimed away from Earth.

YouTube videos with titles like "This is Not a Drill" are optimized for clicks, not accuracy. The data — from GOES, DSCOVR, DONKI, NMDB, and WSPR — tells a clear story: active Sun, routine storm, beautiful physics, zero danger.

We're monitoring all of it across NaNM observations and 7 real-time data streams. When something genuinely dangerous happens, the data will show it. This isn't it.

All data and analysis scripts are open source at github.com/isenbek/terrapulse