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

Past day

4.6A1

First-mode amplitude

20 Oct 2026 · 23:55 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 20 Oct 2026

20 Oct 202619 Oct 2026Gaps = no observation

Observed maximum

68.9relative units

Compared with previous day

+5.4 relative units288 matched observations · mean difference

First-mode frequency

7.9Hz23:55 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

20 Oct 2026 · relative amplitude · UTC
Time	Relative amplitude	Previous day, same time
00:00	4.412	4.115
00:05	4.613	5.264
00:10	4.258	5.52
00:15	5.905	4.4
00:20	5.417	4.785
00:25	10.638	4.547
00:30	6.803	4.515
00:35	6.553	5.091
00:40	10.535	3.86
00:45	6.192	5.001
00:50	12.323	5.056
00:55	14.165	5.302
01:00	15.264	5.467
01:05	23.625	4.969
01:10	14.273	5.72
01:15	14.35	6.426
01:20	12.527	5.14
01:25	10.103	4.865
01:30	16.632	3.863
01:35	10.129	5.136
01:40	9.916	5.045
01:45	7.707	4.903
01:50	8.632	4.979
01:55	9.079	5.662
02:00	12.428	4.721
02:05	7.246	4.337
02:10	7.186	4.321
02:15	6.851	4.558
02:20	9.288	5.365
02:25	8.902	4.221
02:30	6.391	4.241
02:35	5.78	4.247
02:40	7.197	5.136
02:45	9.6	5.948
02:50	8.52	5.075
02:55	6.492	5.341
03:00	9.057	5.781
03:05	5.771	4.778
03:10	5.033	11.194
03:15	6.474	4.651
03:20	6.675	6.455
03:25	6.569	4.375
03:30	9.241	4.323
03:35	9.146	8.067
03:40	6.994	4.235
03:45	9.035	3.923
03:50	8.963	4.325
03:55	7.125	4.761
04:00	4.891	3.484
04:05	7.207	7.798
04:10	13.064	6.342
04:15	10.052	3.4
04:20	7.368	4.099
04:25	9.054	3.087
04:30	13.777	3.657
04:35	7.751	3.603
04:40	13.709	3.624
04:45	28.592	3.821
04:50	47.515	3.112
04:55	14.787	3.4
05:00	9.208	2.966
05:05	6.849	3.51
05:10	7.449	3.238
05:15	13.831	2.964
05:20	11.857	3.356
05:25	14.36	3.111
05:30	17.564	3.963
05:35	10.52	3.481
05:40	7.973	6.413
05:45	5.778	2.966
05:50	5.922	3.054
05:55	6.86	3.037
06:00	4.623	3.203
06:05	5.685	14.242
06:10	6.516	4.216
06:15	6.614	3.951
06:20	6.934	4.018
06:25	6.968	4.177
06:30	6.746	5.427
06:35	6.98	4.639
06:40	7.808	3.407
06:45	6.287	3.714
06:50	7.076	4.02
06:55	6.54	3.306
07:00	5.761	3.89
07:05	7.456	5.071
07:10	10.059	3.558
07:15	7.743	3.626
07:20	6.039	3.839
07:25	6.728	3.929
07:30	5.497	4.576
07:35	6.474	3.995
07:40	5.532	3.865
07:45	6.901	3.949
07:50	6.002	3.892
07:55	8.578	3.812
08:00	9.57	4.084
08:05	8.804	3.904
08:10	15.091	3.965
08:15	18.317	3.537
08:20	20.722	3.763
08:25	31.437	7.527
08:30	32.905	3.419
08:35	32.216	3.77
08:40	23.59	4.33
08:45	31.764	3.862
08:50	18.885	3.631
08:55	18.408	3.783
09:00	15.378	3.894
09:05	8.448	4.328
09:10	6.633	4.195
09:15	5.804	4.16
09:20	5.138	3.965
09:25	7.109	4.047
09:30	13.405	3.985
09:35	7.166	4.151
09:40	6.066	4.751
09:45	6.535	4.063
09:50	5.746	3.886
09:55	6.361	3.686
10:00	5.083	3.921
10:05	5.741	3.798
10:10	5.314	4.463
10:15	6.588	3.756
10:20	5.09	4.302
10:25	5.133	4.234
10:30	5.653	3.655
10:35	5.163	3.738
10:40	6.629	4.035
10:45	7.378	3.61
10:50	6.136	3.486
10:55	7.736	3.529
11:00	5.943	3.461
11:05	8.366	3.563
11:10	6.236	3.652
11:15	6.374	3.772
11:20	6.276	3.969
11:25	7.214	4.48
11:30	5.543	3.528
11:35	6.694	3.707
11:40	5.543	3.272
11:45	5.756	3.559
11:50	7.14	4.013
11:55	5.591	3.248
12:00	5.634	3.476
12:05	6.522	4.32
12:10	6.126	4.612
12:15	10.807	3.877
12:20	4.945	4.43
12:25	4.928	4.062
12:30	3.38	4.986
12:35	4.854	5.533
12:40	4.613	4.692
12:45	4.724	4.686
12:50	5.261	4.457
12:55	3.785	4.325
13:00	5.028	3.561
13:05	4.075	6.96
13:10	5.982	3.673
13:15	5.614	3.216
13:20	5.463	4.144
13:25	6.627	4.37
13:30	9.13	3.628
13:35	38.364	3.952
13:40	37.468	4.005
13:45	49.474	2.901
13:50	14.511	3.345
13:55	16.385	3.213
14:00	15.808	4.573
14:05	8.572	4.633
14:10	6.897	5.271
14:15	6.421	4.638
14:20	6.793	5.555
14:25	6.488	5.597
14:30	5.31	5.264
14:35	6.796	4.779
14:40	5.231	4.417
14:45	5.626	3.273
14:50	4.606	3.965
14:55	5.954	3.862
15:00	8.502	4.5
15:05	6.323	5.155
15:10	7.745	3.716
15:15	8.866	3.159
15:20	14.602	3.348
15:25	55.738	3.545
15:30	68.918	3.341
15:35	41.253	4.115
15:40	14.707	4.125
15:45	10.199	3.942
15:50	7.489	3.736
15:55	12.344	3.583
16:00	9.484	3.732
16:05	10.399	3.354
16:10	8.866	3.268
16:15	11.316	3.188
16:20	8.196	3.427
16:25	10.165	3.266
16:30	6.904	3.592
16:35	13.387	3.545
16:40	22.361	3.437
16:45	20.835	3.153
16:50	8.506	3.035
16:55	14.33	3.369
17:00	6.857	4.046
17:05	9.958	3.875
17:10	10.239	5.934
17:15	11.679	3.627
17:20	10.702	3.83
17:25	16.368	4.371
17:30	18.507	3.567
17:35	17.162	4.482
17:40	7.727	6.946
17:45	6.257	5.202
17:50	7.91	4.742
17:55	14.772	4.335
18:00	17.797	4.35
18:05	15.499	4.478
18:10	21.249	5.851
18:15	14.302	5.355
18:20	19.273	4.518
18:25	17.248	5.335
18:30	11.935	4.912
18:35	17.727	4.177
18:40	15.397	4.173
18:45	18.46	4.294
18:50	8.623	5.199
18:55	8.779	5.628
19:00	37.735	5.888
19:05	23.373	4.282
19:10	14.229	4.971
19:15	15.866	4.706
19:20	8.998	4.746
19:25	7.365	4.638
19:30	7.641	4.121
19:35	10.677	3.993
19:40	7.54	4.147
19:45	5.154	4.889
19:50	5.5	4.175
19:55	6.764	4.338
20:00	20.201	4.81
20:05	10.428	5.75
20:10	5.91	4.51
20:15	6.957	4.239
20:20	5.642	4.62
20:25	5.058	5.761
20:30	5.014	5.36
20:35	5.479	4.396
20:40	5.367	4.498
20:45	4.838	4.111
20:50	6.707	3.806
20:55	4.97	4.173
21:00	7.184	4.283
21:05	4.645	4.191
21:10	5.245	4.474
21:15	4.963	4.927
21:20	5.598	7.042
21:25	4.971	5.562
21:30	3.966	6.215
21:35	4.521	6.017
21:40	4.857	11.027
21:45	3.87	16.97
21:50	3.979	4.412
21:55	6.701	4.899
22:00	3.874	4.882
22:05	4.162	5.169
22:10	4.248	4.579
22:15	3.819	4.469
22:20	4.133	5.016
22:25	3.909	5.396
22:30	4.052	5.406
22:35	3.966	5.561
22:40	3.997	5.554
22:45	4.493	5.148
22:50	3.752	5.224
22:55	3.948	5.403
23:00	4.103	5.093
23:05	3.988	5.559
23:10	3.984	5.558
23:15	3.63	6.384
23:20	3.918	5.917
23:25	4.152	4.889
23:30	3.873	5.422
23:35	3.612	5.51
23:40	3.887	4.288
23:45	3.896	4.572
23:50	4.034	4.289
23:55	4.646	5.334

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.