Cosmic ray measurement and experimental temperature analysis with a muon detector

Kim, Yun Ho; Kang, J.-S.; Jang, Doh Yun; Son, Jae Bum; Kim, Yong Kyun

doi:10.3938/jkps.61.647

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…For instance, these muon detectors and the cosmic ray neutron monitors have the same energy threshold, close to 100 MeV. Also, for detectors installed at the same location, the corrected counting rate of neutron monitors was confirmed to match the counting rate of the muon detector with a correlation coefficient of 0.8046 (Kim et al 2012).…”

Section: Detector Comparisonsmentioning

confidence: 73%

The 2015 Summer Solstice Storm: One of the Major Geomagnetic Storms of Solar Cycle 24 Observed at Ground Level

et al. 2018

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We report on the 22-23 June 2015 geomagnetic storm which occurred during the summer solstice time. There has been a shortage of intense geomagnetic storms during the current solar cycle 24 in relation to the previous cycle. This situation changed after mid-June 2015 when one of the biggest solar active regions (AR 2371) of current solar cycle 24, close to the central meridian produced several coronal mass ejections (CMEs) associated with M-class flares. The CMEs impact on the Earth's magnetosphere resulted in a moderately-severe G4-class geomagnetic storm on 22-23 June 2015 and a G2 (moderate) geomagnetic storms on 24 June. The G4 solstice storm was the second biggest (so far) geomagnetic storms of cycle 24. We highlight the ground level observations made by New-Tupi, Muonca and the CARPET El Leoncito cosmic ray detectors that are located within the South Atlantic Anomaly (SAA) region. These observations are studied in correlation with data obtained by space-borne detectors (ACE, GOES, SDO, and SOHO) and other ground-based experiments. The CME designations are from the Computer Aided CME Tracking (CACTus) automated catalog. As expected, Forbush Decreases (FD) associated with the passing CMEs were recorded by these detectors. We noticed a peculiar feature linked to a severe geomagnetic storm event. The 21 June 2015 CME 0091 was likely associated with the 22 June summer solstice FD event. The angular width of CME 0091 was very narrow and measured ∼ 56 • degrees seen from Earth. In most cases, only CME halos and partial halos, lead to severe geomagnetic storms. We performed a cross-check analysis of the FD events detected during the rise phase of the current solar cycle 24, the geomagnetic parameters, and the CACTus CME catalog. Our study suggests that narrow angular-width CMEs that erupt in the western region of the ecliptic plane can lead to moderate and severe geomagnetic storms. We also report on the strong solar proton radiation storm with onset on 21 June. We did not find a signal from this SEP at ground level. The details of these observations are presented.

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Section: Detector Comparisonsmentioning

confidence: 73%

The 2015 Summer Solstice Storm: One of the Major Geomagnetic Storms of Solar Cycle 24 Observed at Ground Level

et al. 2018

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“…These detectors have similar energy threshold, close to ∼ 100 MeV. Also, it was shown that the correlation coefficient between the two detection systems is close to ∼ 0.8046 (Kim et. al., 2012).…”

Section: Rigidity Dependencementioning

confidence: 92%

Muon Excess at Sea Level during the Progress of a Geomagnetic Storm and High Speed Stream Impact Near the Time of Eath's Heliospheric Sheet Crossing

Augusto,

Navia,

de Oliveira

et al. 2017

Preprint

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In this article we present results of the study on the association between the muon flux variation at ground level, registered by the New-Tupi muon telescopes (22 0 53 00 S, 43 0 06 13 W ; 3 m above sea level) and a geomagnetic storm of 25 -29 August 2015 that has raged for several days as a result of a coronal mass ejection (CME) impact on Earth's magnetosphere. A sequence of events started with an M3.5 X-ray class flare on 22 August 2015 at 21:19 UTC. The New-Tupi muon telescopes observed a Forbush decrease (FD) triggered by this geomagnetic storm, with onset on 26 August 2015. After the Earth crossed a heliospheric current sheet (HCS), an increase in the particle flux was observed on 28 August 2015 by spacecrafts and ground level detectors. The observed peak was in temporal coincidence with the impact of a high speed stream (HSS). We study this increase, that has been observed with a significance above 1.5% by ground level detectors in different rigidity regimes. We also estimate the lower limit of the energy fluence injected on Earth. In addition, we consider the origin of this increase, such as acceleration of particles by shock waves on the front of the HSS and the focusing effect of the HCS crossing. Our results show possible evidence of a prolonged energetic (up to GeV energies) particle injection within the Earth atmosphere system, driven by the HSS. In most cases these injected particles are directed to polar regions. However, the particles from the high energy tail of the spectrum can reach middle latitudes, and that could have

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Muon Excess at Sea Level during the Progress of a Geomagnetic Storm and High-Speed Stream Impact Near the Time of Earth’s Heliospheric Sheet Crossing

Augusto¹,

Navia²,

Oliveira³

et al. 2017

Earth-Affecting Solar Transients

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Cosmic ray measurement and experimental temperature analysis with a muon detector

Cited by 5 publications

References 10 publications

The 2015 Summer Solstice Storm: One of the Major Geomagnetic Storms of Solar Cycle 24 Observed at Ground Level

The 2015 Summer Solstice Storm: One of the Major Geomagnetic Storms of Solar Cycle 24 Observed at Ground Level

Muon Excess at Sea Level during the Progress of a Geomagnetic Storm and High Speed Stream Impact Near the Time of Eath's Heliospheric Sheet Crossing

Muon Excess at Sea Level during the Progress of a Geomagnetic Storm and High-Speed Stream Impact Near the Time of Earth’s Heliospheric Sheet Crossing

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