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7408 |
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Date: January 14, 2024 at 10:35:10
From: Eve, [DNS_Address]
Subject: Electromagnetic manifestations of Tonga eruption in Schumann resonance |
URL: https://www.sciencedirect.com/science/article/abs/pii/S1364682622000712 |
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🌋 EXCERPT:
Abstract
We present results of concurrent observations of anomalous Schumann resonance (SR) signals during the major phase of eruption of Tonga volcano on 15 January 2022. The experimental data were
recorded at French, Italian, Russian, and Japanese observatories that monitor natural electromagnetic signals in the ELF and ULF bands. The major phase of eruption ended by a huge blast, and
all ELF/ULF observatories concurrently detected anomalous SR signals for the first time in the ELF observations, while the ULF records showed nothing unusual. The paper presents anomalous
dynamic SR spectra detected at four widely separated observatories during the Tonga eruption on January 15, 2022. We show that a fourfold increase in the SR intensity was caused by a compact
ELF source localized in the vicinity of Tonga volcano during the major and concluding phase of eruption. Thus, the volcanic SR anomaly emerged from the enormous amount of lightning strokes in
the erupted cloud.
Introduction
The first communication on volcanic eruption at Tonga islands was made in 1912. There were at least three more eruptions during the XX century. The recent cycle of activity at Tonga began on
December 29, 2021, when a series of explosive eruptions occurred. The gas plumes rose to a height of 12 km above the sea level and drifted northward. The volcanic ash fall was localized over
the whole Tonga archipelago.
According to the US Geological Survey (USGS), a large eruption commenced on January 14, 2022 at 04:20 local time followed by a much greater eruption started on January 15, 2022 at 17:14:45 LT
or 04:14:45 UTC. The coordinates of event were: 20.546°S and 175.39°W. Information might be found at the web-sites: https://earthquake.usgs.gov/earthquakes/eventpage/pt22015050/executive. and
https://en.wikipedia.org/wiki/2022_Hunga_Tonga%E2%80%93Hunga_Ha%27apai_eruption_and_tsunami.
The eruption was detected as an earthquake of M 5.8 magnitude at 0 km depth and 68 km NNW of Nuku'alofa, Tonga archipelago. The underwater volcanic eruption and the blast of Tonga volcano were
extremely powerful. It was noted globally, as it launched a tsunami that hit Pacific coastlines from Japan to the United States. The satellite images showed the long, rumbling eruption of the
Hunga Tonga-Hunga Ha'apai volcano with its smoke and ash in the air and with the thunderous roar up to 10,000 km distance at Fairbanks in Alaska. A jump in the air pressure was registered at
weather stations as far as Scotland indicating that the shockwave has traveled around the globe.
The goal of this publication is to present the primary observational data on the manifestation of the Tonga eruption in the worldwide records of global electromagnetic resonance or Schumann
resonance (SR) observed in the ELF band.
🌋...continued at link provided...🌋
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Responses:
[7409] [7415] [7416] [7417] |
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7409 |
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Date: January 14, 2024 at 10:41:22
From: Eve, [DNS_Address]
Subject: Re: Electromagnetic manifestations of Tonga eruption in Schumann... |
URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JD037841?af=R |
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Excerpt from another study:
Observational and Model Impact of Tonga Volcano Eruption on Schumann Resonance
Abstract
Tonga volcano eruption on 15 January 2022 was accompanied by an unprecedentedly high lightning activity in the volcano plume which significantly exceeded the lightning
activity level of the whole globe. We compare model computations with the observed effect of the Tonga volcano eruption on the global electromagnetic Schumann resonance
(SR). This SR disturbance was detected at many observatories covering the whole globe. SR power spectral density was computed using the updated model of the Earth-ionosphere
cavity, with the global lightning detections recorded by the World Wide Lightning Location Network, as a source. The modeled dynamics of the SR disturbances during Tonga
eruption agrees qualitatively and quantitatively with SR recordings from six globally separated observatories. Unprecedentedly high lightning activity during the active
phase of eruption caused significant suppression of the global lightning detection rate without noticeable effect on real global thunderstorm activity.
Key Points
- Lightning activity over Tonga volcano is clearly visible in Schumann resonance (SR) worldwide
- Model of extremely low frequency propagation with World Wide Lightning Location Network detections as a source gives qualitative agreement with observed SR enhancement
during Tonga eruption
- Lightning activity during peak of Tonga eruption is so high that it significantly suppresses global lightning detection rate
Plain Language Summary
Tonga volcano exploded 15 January 2022. This catastrophic event was accompanied by huge lightning activity in the vicinity of volcano inside quickly expanding volcanic
plume. Lightning activity in that volcanic cloud was so high that for several hours it significantly overrode the lightning activity of the whole planet. The Earth-
ionosphere cavity represents a spherical resonator where electromagnetic (EM) waves of extremely low frequencies can propagate and amplify their amplitude on certain
resonant frequencies. This phenomenon is called Schumann resonance (SR). SR can be observed everywhere over the globe at any time due to permanent global lightning activity.
During Tonga volcano eruption different globally separated SR observatories registered power increase in the SR band exceeding the normal planetary background level by an
order of magnitude. This is extremely high for a point source represented by this volcano. We used a model of EM wave propagation in the Earth-ionosphere cavity and
lightning detections recorded by World Wide Lightning Location Network (WWLLN) as source of EM waves to model the impact of the volcanic lightning activity on the global SR
level. We analyzed the impact of extremely high lightning rate on the performance of WWLLN, which was significantly suppressed during active phase of eruption.
....article continues at link.....
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Responses:
[7415] [7416] [7417] |
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7415 |
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Date: January 21, 2024 at 19:59:53
From: Rodney Boulder Field , [DNS_Address]
Subject: Re: How many bovine gigafarts does it take... |
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To equal one Tonga eruption..?
Sorry, just venting.
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Responses:
[7416] [7417] |
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7416 |
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Date: January 22, 2024 at 00:39:07
From: Eve, [DNS_Address]
Subject: Re: How many bovine gigafarts does it take... |
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You might consider taking gas-X for your venting issues lest you explode.
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Responses:
[7417] |
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7417 |
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Date: January 22, 2024 at 00:52:11
From: Eve, [DNS_Address]
Subject: Re: Raymond's gas venting issues.... |
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Also in the future please don't change my subject headers to your gassy bovine eating
venting verbiage or any other topical change....The topic is about frequency
detection via the Schumann Resonance before the Tonga volcanic eruption not about
your ventilation issue. Thank you for the consideration. (I only changed mine because
you totally changed the subject topic first...I don't care for doing so at all and
it's rare I do like now).
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Responses:
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