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Variations in the Inferred Cosmic-Ray Spectral Index as Measured by Neutron Monitors in Antarctica Astrophysical Journal, 2025 (Ref: 17374)
Authors:
Muangha P.Ruffolo D.Sáiz A.Banglieng C.Evenson P.Seunarine S.Oh S.Jung J.Duldig M.Humble J.
Category 1: Peer-reviewed literature

A technique has recently been developed for tracking short-term spectral variations in Galactic cosmic rays (GCRs) using data from a single neutron monitor (NM)…

Global Analysis of the Extended Decreases in Cosmic Rays Observed with Worldwide Networks of Neutron Monitors and Muon Detectors: Temporal Variation of the Rigidity Spectrum and Its Implication Astrophysical Journal, 2025 (Ref: 17375)
Authors:
Munakata K.Hayashi Y.Kozai M.Kato C.Miyashita N.Kataoka R.Kadokura A.Miyake S.Iwai K.Echer E.Dal Lago A.Rockenbach M.Schuch N.J.Bageston J.V.Braga C.R.Al Jassaar H.K.Sharma M.M.Duldig M.L.Humble J.E.Sabbah I.Evenson P.Kuwabara T.Kóta J.
Category 1: Peer-reviewed literature

This paper presents the global analysis of two extended decreases in the galactic cosmic-ray intensity observed by worldwide networks of ground-based detectors in 2012. This analysis is capable of separately deriving the cosmic-ray density (or omnidirectional intensity) and anisotropy…

Ground-based observations of temporal variation of cosmic ray spectrum during Forbush decreases NMDB Meeting 2025: Cosmic Ray Studies with Neutron Detectors, Athens, Greece, 2025 (Ref: 17355)
Authors:
Mitthumsiri W.Ruffolo D.Munakata K.Muangha P.Sáiz A.Evenson P.Mangeard P.-S. Clem J.Seunarine S.Nuntiyakul W.GMDN Collaboration
Category 3: Abstract

Metal lability, sea ice cover, and physicochemical properties of sediments as predictors of benthic communities in Antarctic coastal environments Environmental Pollution, 2025 (Ref: 17305)
Authors:
Koppel D.J.Price G.A.V.Brown K.A.King C.K.Stevenson S.Gissi F.Greenfield P.Adams M.S.Luter H.M.Stark J.S.Jolley D.F.
Category 1: Peer-reviewed literature

Metals are important nutrients to marine life but may cause toxicity at elevated concentrations. There is uncertainty about how sediment metal concentrations influence benthic biodiversity, in part because metal bioavailability depends on sediment properties.

Cross-counter time-delay distributions at the Mawson neutron monitor Proceedings of 38th International Cosmic Ray Conference, 2024 (Ref: 17184)
Authors:
Sáiz A.Ruffolo D.Sukha T.Muangha P.Mitthumsiri W.Chaiwongkhot K.Nuntiyakul W.Somboon E.Evenson P.Duldig M.Humble J.
Category 3: Conference paper

For decades, neutron monitors have been the primary source of ground-level data for studying cosmic rays with rigidities slightly above the geomagnetic cutoff. The NM64 instrument design, the standard for neutron monitors, has been optimized to monitor neutrons produced in atmospheric cascades.

Solar Magnetic Polarity Effect on Neutron Monitor Count Rates: Comparing Latitude Surveys and Antarctic Stations Proceedings of 38th International Cosmic Ray Conference, 2024 (Ref: 17182)
Authors:
Poopakun K.Nuntiyakul W.Khamphakdee S.Seripienlert A.Ruffolo D.J.Evenson P.Peng J.Chuanraksasat P.Munakata K.Duldig M.Humble J.Madsen J.Soonthornthum B.Komonjinda S.
Category 3: Conference paper

The Galactic cosmic ray spectrum manifests pronounced variations over the 11-year sunspot cycle and more subtle variations over the 22-year solar magnetic cycle.

Solar Magnetic Polarity Effect on Neutron Monitor Count Rates: Comparing Latitude Surveys and Antarctic Stations 2023 Fall Meeting of the American Geophysical Union, 2024 (Ref: 17181)
Authors:
Poopakun K.Nuntiyakul W.Khamphakdee S.Seripienlert A.Ruffolo D.J.Evenson P.E.Munakata K.Jiang P.Chuanraksasat P.Duldig M.L.Humble J.E.Madsen J.Soonthornthum B.Komonjinda S.
Category 3: Verbal presentation

The Galactic cosmic ray spectrum manifests pronounced variations over the 11-year sunspot cycle and more subtle variations over the 22-year solar magnetic cycle.

Solar Magnetic Polarity Effect on Neutron Monitor Count Rates: Comparing Latitude Surveys and Antarctic Stations. The Astrophysical Journal, 2023 (Ref: 17146)
Authors:
Poopakun K.Nuntiyakul W.Khamphakdee S.Seripienlert A.Ruffolo D.Evenson P.Jiang P.Chuanraksasat K.Munakata K.Duldig M.L.Humble J.E.Madsen J.Soonthornthum B.Komonjinda S.
Category 1: Peer-reviewed literature

The Galactic cosmic-ray spectrum manifests pronounced variations over the 11 yr sunspot cycle and more subtle variations over the 22 yr solar magnetic cycle. An important tool to study these variations is repeated latitude surveys with neutron monitors (NMs)…

Analysis of Cosmic Rays' Atmospheric Effects and Their Relationships to Cutoff Rigidity and Zenith Angle Using Global Muon Detector Network Data Journal of Geophysical Research - Space Physics, 2019 (Ref: 16881)
Authors:
Mendonca R.R.S.Wang C.Braga C.R.Echer E.Dal Lago A.Costa J.E.R.Munakata K.Li H.Liu Z.Raulin J.-P Kuwabara T.Kozai M.Kato C.Rockenbach M.Schuch N.J.Al Jassar H.K.Sharma M.M.Tokumaru M.Duldig M.L.Humble J.E.Evenson P.Sabbah I.
Category 1: Peer-reviewed literature

Cosmic rays are charged particles whose flux observed at Earth shows temporal variations related to space weather phenomena and may be an important tool to study them. The cosmic ray intensity recorded with ground-based detectors also shows temporal variations arising from atmospheric variations.

Multi-model mean nitrogen and sulfur deposition from the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP): evaluation of historical and projected future changes Atmospheric Chemistry and Physics, 2013 (Ref: 15516)
Authors:
Lamarque J.F.Dentener F.McConnell J.Ro C.U.Shaw M.Vet R.Bergmann D.Cameron-Smith P.Dalsoren S.Doherty R.Faluvegi G.Ghan S.J.Josse B.Lee Y.H.Mackenzie I.A.Plummer D.Shindell D.T.Skeie R.B.Stevenson D.S.Strode S.Zeng G.Curran M.Dahl-Jensen D.Das S.Fritzsche D.Nolan M.
Category 1: Peer-reviewed literature

Paleoclimate Data–Model Comparison and the Role of Climate Forcings over the Past 1500 Years. Journal of Climate, 2013 (Ref: 15215)
Authors:
Phipps S.J.McGregor H.V.Gergis J.Gallant A.J.E.Neukom R.Stevenson S.Ackerley D.Brown J.R.Fischer M.J.van Ommen T.D.
Category 1: Peer-reviewed literature

Observations of Forbush Decrease Precursors on 14 December 2006. 19th Australian Institute of Physics Congress, 5-9 December 2010, 2010 (Ref: 14284)
Authors:
Fushishita A.Kuwabara T.Kato C.Yasue S.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Tokumaru M.Duldig M.L.Humble J.E.Sabbah I.Al Jassar H.K.Sharma M.M.Munakata K.
Category 3: Abstract

Global Muon Detector Network – GMDN and the Space Situational Awareness Conference Abstracts, Cospar 2010, 38th Scientific Assembly, 18-25 July 2010, Bremen, Germany, Paper, 2010 (Ref: 14192)
Authors:
Schuch N.J.Munakata K.Dal Lago A.Echer E.Gonzalez W.D.Da Silva M.R.Rigozo N.R.Petry A.Pinheiro D.K.Braga C.R.Silveira M.V.D.Stekel T.R.C.Antunes C.E.Kemmerlich N.Kato C.Fushishita A.Fujii Z.Bieber J.Evenson P.Kuwubara T.Duldig M.L.Humble J.E.Chilingarian A.Sabbah I.Jansen F.
Category 3: Abstract

Space weather forecasting is a very important tool for the space situational awareness to the space objects, the space environment and related threats and risks for manned and non-manned spacecrafts. The global network of ground based multi-directional detectors (GMDN)…

Observation of Forbush Decrease Precursors on 2006 December 14 with the Global Muon Detector Network Astronomical Society of Australia Annual Science Meeting 2010, Hobart, 5-8 July, 2010 (Ref: 14165)
Authors:
Duldig M.Fushishita A.Kuwabara T.Kato C.Yasue S.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Tokumaru M.Humble J.E.Sabbah I.Al Jassar H.K.Sharma M.M.Munakata K.
Category 3: Abstract

We analyse the precursor of a Forbush decrease (FD) observed with the Global Muon Detector Network on 2006 December 14. An intense geomagnetic storm was also recorded during this FD with the peak Kp index of 8+.

Drift Effects and the Average Features of Cosmic Ray Density Gradient in CIRS During Successive Two Solar Minimum Periods Advances in Geosciences, Vol 21: Solar Terrestrial (ST), 2010 (Ref: 14151)
Authors:
Fushishita A.Narumi T.Kato C.Yasue S.Munakata K.Okazaki Y.Kuwabara T.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Tokumaru M.Duldig M.L.Humble J.E.Sabbah I.Kóta J.
Category 1: Peer-reviewed literature

Precursors of the forbush decrease on December 14, 2006 observed with the Global Muon Detector Network (GMDN) Proceedings of the 31st International Cosmic Ray Conference, Lodz, Poland, 2009 (Ref: 14079)
Authors:
Fushishita A.Munakata K.Miyasaka E.Kato C.Yasue S.Kuwabara T.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Tokumaru M.Duldig M.L.Humble J.E.Sabbah I.
Category 3: Conference paper

We analyze the precursory anisotropy … of a Forbush decrease observed with the multidirectional … muon detector at S˜ao Martinho in Brazil … on December 14, 2006. By subtracting contribution … from the diurnal anisotropy precisely determined by … the GlobalMuon Detector Network (GMDN)…

Precursors of the Forbush decrease on 2006 December 14 observed with the Global Muon Detector Network (GMDN) The Astrophysical Journal, 2010 (Ref: 14066)
Authors:
Fushishita A.Kuwabara T.Kato C.Yasue S.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Tokumaru M.Duldig M.L.Humble J.E.Sabbah I.Al Jassar H.K.Sharma M.M.Munakata K.
Category 1: Peer-reviewed literature

We analyze the precursor of a Forbush decrease (FD) observed with the Global Muon Detector Network on 2006 … December 14. An intense geomagnetic storm is also recorded during this FD with the peak Kp index of 8+.

First geomagnetic storm ever observed from the Middle East using cosmic rays Proceedings of the 21st European Cosmic Ray Symposium, Kosice, Slovakia, 9-12 September 2008, 2008 (Ref: 13836)
Authors:
Sabbah I.Munakata K.Duldig M.L.Fushishita A.Kato C.Yasue S.Kuwabara T.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Fujii Z.Humble J.E.
Category 3: Conference paper

The Global Muon Detector Network (GMDN) was … completed by installing a multi-directional cosmic-ray muon … hodoscope in Kuwait University in March 2006. The GMDN is … currently consisting of four multi-directional muon detectors … located at Nagoya (Japan), Hobart (Australia), Sao Martinho …

Determination of interplanetary coronal mass ejection geometry and orientation from ground-based observations of galactic cosmic rays Journal of Geophysical Research, 2009 (Ref: 13794)
Authors:
Kuwabara T.Bieber J.W.Evenson P.Munakata K.Yasue S.Kato C.Fushishita A.Tokumaru M.Duldig M.L.Humble J.E.Silva M.R.Dal Lago A.Schuch N.J.
Category 1: Peer-reviewed literature

We have developed a method for determining interplanetary coronal mass ejection … (ICME) geometry from galactic cosmic ray data recorded by the ground-based muon … detector network. The cosmic ray density depression inside the ICME, which is associated … with a Forbush decrease…

Space weather forecasting -a multi directional telescope for detection of high energy cosmic rays - muons - Southern Space Observatory - Brazil 37th COSPAR Scientific Assembly, Montreal, Canada, 13-20 July 2008, 2008 (Ref: 13454)
Authors:
Schuch N.J.Dal Lago A.Echer E.Munakata K.Bieber J.W.Da Silva M.Duldig M.L.Evenson P.Fujii Z.Gonzalez Alarcon W.D.Kato C.Kemmerich N.Kummer F.D.Kuwabara T.Sabbah I.Silveira M.V.D.Stekel T.R.C.Braga C.R.Chilingarian A.Hippler R.Humble J.E.
Category 3: Conference paper

A multi-directional telescope for detection of high-energy galactic cosmic rays (GCRs) - muons … was installed in 2001, through an international cooperation between Brazil, Japan and USA, and … operated since then at the Southern Space Observatory - SSO/CRS/INPE - MCT, (29S, 53W)…

A calibration neutron monitor: Energy response and instrumental temperature sensitivity Journal of Geophysical Research, 2008 (Ref: 13467)
Authors:
Krüger H.Moraal H.Bieber J.W.Clem J.M.Evenson P.A.Pyle K.R.Duldig M.L.Humble J.E.
Category 1: Peer-reviewed literature

Neutron monitors are integral detectors of secondary cosmic rays. Since each of them … has its own detection efficiency, energy spectra cannot readily be derived from their … observations. To circumvent this problem…

Drift effects and the cosmic ray density gradient in a solar rotation period: first observation with the Global Muon Detector Network (GMDN) The Astrophysical Journal, 2008 (Ref: 13404)
Authors:
Okazaki Y.Fushishita A.Narumi T.Kato C.Yasue S.Kuwabara T.Bieber J.W.Evenson P.Da Silva M.R.Dal Lago A.Schuch N.J.Fujii Z.Duldig M.L.Humble J.E.Sabbah I.Kota J.Munakata K.
Category 1: Peer-reviewed literature

We present for the first time hourly variations of the spatial density gradient of 50 GeV cosmic rays within a sample … solar rotation period in 2006. By inversely solving the diffusive flux equation, including the drift…

Experiments with two calibration neutron monitors Proceedings of the 30th International Cosmic Ray conference, Mérida, Mexico, 2007 (Ref: 13189)
Authors:
Krüger H.Moraal H.Bieber J.W.Clem J.M.Evenson P.A.Pyle K.R.Duldig M.L.Humble J.E.
Category 3: Abstract

Abstract: Two identical calibration neutron monitors were completed in September 2002. They are … designed to provide an intercalibration between the ¡Ö 50 neutron monitors around the world, so that … rigidity spectra can be calculated from them.

First spaceweather observations at MuSTAnG - the Muon Spaceweather Telescope for Anisotropies at Greifswald Proceedings of the 30th International Cosmic Ray conference, Mérida, Mexico, 2007 (Ref: 13187)
Authors:
Hippler R.Mengel A.Jansen F.Bartling G.Göhler W.Kudela K.Munakata K.Yasue S.Kato C.Duldig M.L.Bieber J.W.Evenson P.Schuch N.J.Dal Lago A.Silva M.R.Sabbah I.
Category 3: Abstract

First results of the Muon Spaceweather Telescope for Anisotropies at Greifswald (MuSTAnG) that is dedicated to spaceweather forecasting are reported.

Determination of ICME geometry and orientation from ground based observations of galactic cosmic rays Proceedings of the 30th International Cosmic Ray Conference, Mérida, Mexico, 2007 (Ref: 13186)
Authors:
Kuwabara T.Bieber J.W.Evenson P.Munakata K.Yasue S.Kato C.Fujii Z.Duldig M.L.Humble J.E.Silva M.R.Trivedi N.B.Gonzalez W.D.Alisson L.Schuch N.J.
Category 3: Abstract

We have developed a method for determining ICME (Interplanetary coronal mass ejection) geometry from galactic cosmic ray data recorded by the ground-based muon detector network. The … cosmic ray density depression inside the ICME, which is the cause of a Forbush decrease…

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