A closer look at Earth's natural signals

Schumann resonance today.

Explore Tomsk, Nagycenk and Etna. Follow numeric observations where available, read source spectrograms and understand what each station measures.

The listening network

One Earth.
Different perspectives.

Explore the signal from different instruments. Each station tells a local story.

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EUROPENagycenkHungary EtnaSicilyEtna pin: Nicolosi area · Natural Earth

All times UTC

Latest observations

4.1A1

First-mode amplitude

21 Oct 2026 · 14:50 UTC

This is a local station observation in relative source units. A larger amplitude does not mean that the resonance frequency has become that number.

Relative amplitude 21 Oct 2026

21 Oct 2026 · day in progress20 Oct 2026Gaps = no observation

Maximum so far

26.2relative units

Compared with previous day

-4.3 relative units179 matched observations · mean difference

First-mode frequency

7.9Hz14:50 UTC · separate observation

Station observations · Tomsk observatory ↗

Relative source units, not pT. Amplitude is not frequency.

First-mode amplitude describes the strength of a signal at one station. Frequency describes where the resonance peak sits; it is a different measurement.

Read the chart guide ↗

View observations as a table

21 Oct 2026 · relative amplitude · UTC
Time	Relative amplitude	Previous day, same time
00:00	4.736	4.412
00:05	4.322	4.613
00:10	4.46	4.258
00:15	4.734	5.905
00:20	4.626	5.417
00:25	4.486	10.638
00:30	5.287	6.803
00:35	5.205	6.553
00:40	5.614	10.535
00:45	4.803	6.192
00:50	4.964	12.323
00:55	6.011	14.165
01:00	5.486	15.264
01:05	5.88	23.625
01:10	5.662	14.273
01:15	22.003	14.35
01:20	11.582	12.527
01:25	9.075	10.103
01:30	6.7	16.632
01:35	6.013	10.129
01:40	5.822	9.916
01:45	5.739	7.707
01:50	5.484	8.632
01:55	5.574	9.079
02:00	5.622	12.428
02:05	7.861	7.246
02:10	5.26	7.186
02:15	6.21	6.851
02:20	5.444	9.288
02:25	4.842	8.902
02:30	5.662	6.391
02:35	4.87	5.78
02:40	4.26	7.197
02:45	4.981	9.6
02:50	4.8	8.52
02:55	7.687	6.492
03:00	5.346	9.057
03:05	4.484	5.771
03:10	4.26	5.033
03:15	4.365	6.474
03:20	4.745	6.675
03:25	4.078	6.569
03:30	4.097	9.241
03:35	3.456	9.146
03:40	4.011	6.994
03:45	3.415	9.035
03:50	4.072	8.963
03:55	3.745	7.125
04:00	3.985	4.891
04:05	4.259	7.207
04:10	4.887	13.064
04:15	3.32	10.052
04:20	3.955	7.368
04:25	3.744	9.054
04:30	3.627	13.777
04:35	3.574	7.751
04:40	3.196	13.709
04:45	3.964	28.592
04:50	3.742	47.515
04:55	3.61	14.787
05:00	3.065	9.208
05:05	3.445	6.849
05:10	3.619	7.449
05:15	3.908	13.831
05:20	4.624	11.857
05:25	3.577	14.36
05:30	3.729	17.564
05:35	4.289	10.52
05:40	4.819	7.973
05:45	4.109	5.778
05:50	4.168	5.922
05:55	4.62	6.86
06:00	4.941	4.623
06:05	6.568	5.685
06:10	6.002	6.516
06:15	5.87	6.614
06:20	5.37	6.934
06:25	5.456	6.968
06:30	8.274	6.746
06:35	6.424	6.98
06:40	6.267	7.808
06:45	6.173	6.287
06:50	5.248	7.076
06:55	5.749	6.54
07:00	5.737	5.761
07:05	6.266	7.456
07:10	6.26	10.059
07:15	6.328	7.743
07:20	5.151	6.039
07:25	7.676	6.728
07:30	4.986	5.497
07:35	6.011	6.474
07:40	5.709	5.532
07:45	5.34	6.901
07:50	5.091	6.002
07:55	5.629	8.578
08:00	4.927	9.57
08:05	4.658	8.804
08:10	4.663	15.091
08:15	8.755	18.317
08:20	5.588	20.722
08:25	4.986	31.437
08:30	5.727	32.905
08:35	8.487	32.216
08:40	5.063	23.59
08:45	4.805	31.764
08:50	5.359	18.885
08:55	4.946	18.408
09:00	5.211	15.378
09:05	5.319	8.448
09:10	6.016	6.633
09:15	5.054	5.804
09:20	5.144	5.138
09:25	5.454	7.109
09:30	4.224	13.405
09:35	4.031	7.166
09:40	4.077	6.066
09:45	3.723	6.535
09:50	4.111	5.746
09:55	4.158	6.361
10:00	3.862	5.083
10:05	3.833	5.741
10:10	3.793	5.314
10:15	4.172	6.588
10:20	3.73	5.09
10:25	3.435	5.133
10:30	3.753	5.653
10:35	3.98	5.163
10:40	4.802	6.629
10:45	6.025	7.378
10:50	11.63	6.136
10:55	18.085	7.736
11:00	21.225	5.943
11:05	14.995	8.366
11:10	26.195	6.236
11:15	20.631	6.374
11:20	8.486	6.276
11:25	4.684	7.214
11:30	4.903	5.543
11:35	4.585	6.694
11:40	4.362	5.543
11:45	4.737	5.756
11:50	4.018	7.14
11:55	3.981	5.591
12:00	4.007	5.634
12:05	3.832	6.522
12:10	3.572	6.126
12:15	3.74	10.807
12:20	3.476	4.945
12:25	3.547	4.928
12:30	3.597	3.38
12:35	3.771	4.854
12:40	3.901	4.613
12:45	3.329	4.724
12:50	3.899	5.261
12:55	3.958	3.785
13:00	4.559	5.028
13:05	3.758	4.075
13:10	3.523	5.982
13:15	4.776	5.614
13:20	3.481	5.463
13:25	3.688	6.627
13:30	3.8	9.13
13:35	3.812	38.364
13:40	3.788	37.468
13:45	4.123	49.474
13:50	4.128	14.511
13:55	3.737	16.385
14:00	4.028	15.808
14:05	4.393	8.572
14:10	4.166	6.897
14:15	7.214	6.421
14:20	6.155	6.793
14:25	4.499	6.488
14:30	4.664	5.31
14:35	4.276	6.796
14:40	3.989	5.231
14:45	3.671	5.626
14:50	4.088	4.606

Schumann Pulse for iPhone

A little context.
With you through the day.

Keep observations close, choose activity alerts and build a journal of your own day. Explore comparisons as your history grows.

Explore the iPhone app Coming soon to the App StoreAlready installed? Open Today ↗

Read the signal with confidence.

01 / The chart

Amplitude is not frequency ↗

Read axes, colours and missing periods without turning every bright band into a claim.

02 / The science

Why Earth has resonances ↗

Lightning, the Earth–ionosphere cavity and the often-quoted 7.83 Hz fundamental.

03 / The stations

A world of listening stations ↗

Explore documented research locations and the different instruments behind the observations.

Different stations. Different measurements.

Schumann resonances are electromagnetic resonances of the Earth–ionosphere cavity, mainly excited by lightning. A station measures a local signal shaped by global activity, propagation, local interference and its instruments.

Amplitude describes signal strength. Frequency, measured in hertz, describes the position of a resonance peak. The often-quoted 7.83 Hz is an approximate reference for the first mode, not a live reading or a fixed number for every moment. Different instruments and source units mean the stations’ amplitudes should not be combined into a global score.

For Tomsk, we draw original charts from subscribed numeric observations, using five-minute averages of samples around each timestamp. Times are converted to UTC. The comparison uses matching times on both days; missing observations remain gaps. A reading more than 90 minutes old is marked delayed. Etna provides an attributed source spectrogram; Nagycenk’s display is linked at the observatory. Neither has a numerical feed connected here yet.

Understand the frequencies ↗ · Our source standards

One Earth.Different perspectives.