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Schumann resonance today.

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

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

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All times UTC

Latest observations

4.7A1

First-mode amplitude

21 Oct 2026 · 15:50 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

-5.0 relative units191 matched observations · mean difference

First-mode frequency

7.9Hz15:50 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
14:55	4.053	5.954
15:00	4.266	8.502
15:05	4.307	6.323
15:10	4.351	7.745
15:15	4.312	8.866
15:20	4.127	14.602
15:25	4.29	55.738
15:30	4.414	68.918
15:35	4.273	41.253
15:40	4.401	14.707
15:45	4.021	10.199
15:50	4.704	7.489

Schumann Pulse for iPhone

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

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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.