Discovery of the pearl waves by Eyvind Sucksdorff

Raita, Tero; Kultima, J.

doi:10.1016/j.jastp.2007.01.013

“…3.5), developed instruments for the measurements of magnetic variations (La Cour and Sucksdorff, 1936). His doctoral thesis was devoted to the periodicity of magnetic disturbances, which is called space weather today (Sucksdorff, 1942;Raita and Kultima, 2007). Sucksdorff laid the foundation for an entire research field, which later led to the formation of a national research community in the field of geomagnetic pulsations and magnetic disturbances.…”

Section: Extension Of the Observational Program Undermentioning

confidence: 99%

The Geophysical Observatory in Sodankylä, Finland – past and present

Bösinger

¹

2021

Hist. Geo Space. Sci.

4

0

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Abstract. After a preface, we will first try to depict the history of the Geophysical Observatory in Sodankylä (SGO) by referring to the personalities who have run and have shaped the observatory. Thereafter, we describe the history from a technical point of view, i.e., what the measurements were, and which instruments were primarily used at the observatory. We will also refer to present operational forms and techniques. We start with the very first systematic meteorological and geophysical observations made in Finland and end by referring to the involvement in ongoing international scientific programs.

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“…Our review focuses on the so-called pearl necklaceone of the most mysterious wave phenomena in near-Earth space. Pearl waves were discovered by E. Sucksdorff and L. Harang at Sodankylä and Tromso observatories in the mid-1930s (see [Kangas et al, 1998;Raita, Kultima, 2007]). In the systematics of ultralow-frequency (ULF) electromagnetic waves of natural origin, pearl waves are classified as Pc1 (0.2-5 Hz frequency range) [Troitskaya, 1964].…”

Section: Introductionmentioning

confidence: 99%

Problems of the Pc1 magnetospheric wave theory. A review

Gulelmi

¹

,

Guglielmi

²

,

Potapov³

2019

Solar-Terrestrial Physics

3

0

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The Pc1 ultralow-frequency electromagnetic waves (frequency range 0.2–5 Hz), also known as pearl necklace, are a unique phenomenon in near-Earth space physics. Many properties of pearls remain a mystery, despite the research of prominent cosmophysicists for more than half a century. In the proposed review, we briefly outline the main points of the so-called standard model, which is widely used to interpret Pc1. Next, we focus on the criticism of the standard model and on the identification of open problems in the Pc1 theory. The general conclusion is that it is necessary to develop new ideas outside the framework of the standard model in order to understand the processes of excitation and propagation of Pc1 waves in Earth’s magnetosphere.

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Problems of the Pc1 magnetospheric wave theory. A review

Gulelmi

¹

,

Guglielmi

²

,

Potapov³

et al. 2019

Solnechno-Zemnaya Fizika

2

0

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The Pc1 ultralow-frequency electromagnetic waves (frequency range 0.2–5 Hz), also known as pearl necklace, are a unique phenomenon in near-Earth space physics. Many properties of pearls remain a mystery, despite the research of prominent cosmophysicists for more than half a century. In the proposed review, we briefly outline the main points of the so-called standard model, which is widely used to interpret Pc1. Next, we focus on the criticism of the standard model and on the identification of open problems in the Pc1 theory. The general conclusion is that it is necessary to develop new ideas outside the framework of the standard model in order to understand the processes of excitation and propagation of Pc1 waves in Earth’s magnetosphere.

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Discovery of the pearl waves by Eyvind Sucksdorff

Cited by 4 publications

References 3 publications

The Geophysical Observatory in Sodankylä, Finland – past and present

The Geophysical Observatory in Sodankylä, Finland – past and present

Problems of the Pc1 magnetospheric wave theory. A review

Problems of the Pc1 magnetospheric wave theory. A review

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