Mount Etna, Sicily, Italy (37.7°N, 15.0°E)
ETNA Radio Observatory
Right now
Etna: 35 · global avg: 56
Quieter than: Tomsk (45), Eskdalemuir (65), California (72), Alberta (85)
Latest Spectrogram
Hey there! This past week at the Etna station has been pretty interesting. We saw a nice peak activity of 95, which is quite high, and there were a few other moments where things really lit up, with three readings going above 80. Most of the time, though, things were fairly calm, averaging around 50.
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Notable events (last 30 days)
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95
View day →2026-07-01
The rightmost portion of the chart shows a massive, high-intensity signal saturation across all frequencies. The PSD …
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95
View day →2026-07-01
The rightmost portion of the spectrogram shows an intense, saturated red/white broadband signal that obscures the typ…
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95
View day →2026-07-01
The rightmost portion of the spectrogram is dominated by high-intensity, broadband red/white saturation that masks th…
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75
View day →2026-07-01
The rightmost portion of the spectrogram shows a transition into high-intensity, broadband noise that obscures the st…
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75
View day →2026-06-30
The rightmost portion of the spectrogram shows sustained, elevated yellow and red intensity across all primary Schuma…
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75
View day →2026-06-25
The rightmost portion of the spectrogram shows persistent, high-intensity vertical activity that obscures the standar…
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75
View day →2026-06-24
The rightmost portion of the spectrogram shows intense, persistent vertical activity and elevated background noise le…
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75
View day →2026-06-24
The rightmost portion of the spectrogram shows high-intensity yellow and red coloring, indicating a significant incre…
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75
View day →2026-06-23
The rightmost portion of the spectrogram shows a high-intensity, broadband vertical event that obscures the standard …
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75
View day →2026-06-23
The rightmost portion of the spectrogram shows intense, saturated red and yellow vertical activity extending across t…
Last 14 days
Quick scan of recent activity — tap a day for the full check-in.
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Open calendarETNA — volcano-flanked seismic lens
ETNA sits on the eastern slopes of Europe's most active volcano, in a region where tectonic stress and space weather intersect in fascinating ways.
Operated by INGV (Italian National Institute of Geophysics and Volcanology), it combines Schumann resonance monitoring with seismic observation — a rare dual-purpose site.
Mediterranean storms and occasional volcanic tremors show up in its signal, making ETNA one of the most distinctive-looking spectrograms in the network. Visit etna-ero.it
Trust & authority
ETNA Radio Observatory
Operating since 2016 · 10 years of continuous monitoring
Frequently asked questions
How does ETNA measure Schumann resonance?
ETNA uses a coil magnetometer tuned for ELF/VLF frequencies (0–105 Hz). It produces an 8-hour rolling spectrogram updated several times per day, visible at etna-ero.it.
Why is ETNA important to our network?
ETNA sits on an active volcano and is operated by INGV (Italy's national volcanology institute), which combines seismic monitoring with electromagnetic observation. It is our only dual-purpose geophysical site.
When was its last major event?
Check the Notable events section above — it lists the top 10 highest-score events at ETNA from the last 30 days, each linked to its full daily context.
How reliable is the data?
INGV is Italy's national scientific authority for geophysics. The ETNA station has been operating since 2016 and the data is used in INGV's own research. We cross-validate readings against other stations with our IDW weighting algorithm.
Where does the raw data come from?
Raw spectrogram images come directly from etna-ero.it. We ignore known artifacts (50 Hz mains interference) and focus on the 3–40 Hz Schumann band. Visit etna-ero.it for the original feed.
