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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)…

Anisotropic Forbush decrease of 24 March 2024: First look Advances in Space Research, 2024 (Ref: 17376)
Authors:
Mishev A.Larsen N.Asvestari E.Sáiz A.Shea M.A.Strauss D.Ruffolo D.Banglieng C.Seunarine S.Duldig M.L.Gil A.Blanco J.J.García-Población O.Cervino-Solana P.Adams Jr J.H.Usoskin I.
Category 1: Peer-reviewed literature

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

Ground-based Observations of Temporal Variation of the Cosmic-Ray Spectrum during Forbush Decreases The Astrophysical Journal Letters, 2025 (Ref: 17354)
Authors:
Mitthumsiri W.Ruffolo D.Munakata K.Kozai M.Hayashi Y.Kato C.Muangha P.Sáiz A.Evensor P.Mangeard P.-S. Clem J.Seunarine S.Nuntiyakul W.Miyashita N.Kataoka R.Kadokura A.Miyake S.Iwai K.Menjo H.Echer E.Dal Lago A.Rockenbach M.Schuch N.J.Bageston J.V.Braga C.R.Al Jassar H.K.Sharma M.M.Burahmah N.Zaman F.Duldig M.L.Sabbah I.Kuwabara T.
Category 1: Peer-reviewed literature

Observations of temporary Forbush decreases (FDs) in the Galactic cosmic-ray (GCR) flux due to the passage of solar storms are useful for space-weather studies and alerts. Here…

Monte Carlo Simulation of the Neutron Monitor and Position-Dependent Bare Neutron Counter Yield Functions at Mawson Station, Antarctica 38th International Cosmic Ray Conference, 2024 (Ref: 17183)
Authors:
Madlee S.Ruffolo D.Sáiz A.Muangha P.Nuntiyakul W.Seripienlert A.Mangeard P.S.Duldig M.L.Humble J.
Category 3: Conference paper

Neutron monitors (NMs) are ground-based detectors that are widely used to detect secondary particles produced by the collisions of primary cosmic rays (CRs) and air molecules in the Earth's atmosphere. Bare neutron counters (BCs), operated without the lead producer and polyethylene reflector…

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)…

Extended Cosmic Ray Decreases with Strong Anisotropy after Passage of Interplanetary Shocks Astrophysical Journal, 2022 (Ref: 16857)
Authors:
Buatthaisong N.Ruffolo D.Saiz A.Banglieng C.Mitthumsiri W.Nutaro T.Nuntiyakul W.
Category 1: Peer-reviewed literature

Neutron Monitor observations of the January 20, 2005 Ground Level Enhancement. Solar, Heliosphere and Interplanetary Environment (SHINE) Workshop, Utah, USA, August 2006, 2006 (Ref: 12810)
Authors:
Beiber J.W.Clem J.Evenson P.Pyle R.Ruffolo D.Rujiwarodom M.Sáiz A.Duldig M.Humble J.
Category 3: Poster

Relativistic solar neutrons and protons on 28 October 2003. Geophysical Research Letters, 2005 (Ref: 11873)
Authors:
Bieber J.W.Clem J.Evenson P.Pyle R.Ruffolo D.Saiz A.
Category 1: Peer-reviewed literature

Largest GLE in Half a Century: Neutron Monitor Observations of the January 20, 2005 Event. Proceedings of the 29th International Cosmic Ray Conference, Pune, India, 2005 (Ref: 12309)
Authors:
Beiber J.W.Clem J.Evenson P.Pyle R.Duldig M.Humble J.Ruffolo D.Rujiwarodom M.Sáiz A.
Category 3: Conference paper

Within a 6-minute span on January 20, 2005, the count rate registered by a neutron monitor at the sea level … station of McMurdo, Antarctica increased by a factor of 30, while the rate at the high-altitude (2820 m) site … of South Pole increased by a factor of 56.

Relativistic Particle Injection and Interplanetary Transport during the January 20, 2005 Ground Level Enhancement. Proceedings of the 29th International Cosmic Ray Conference, Pune, India, 2005 (Ref: 12307)
Authors:
Sáiz A.Ruffolo D.Rujiwarodom M.Bieber J.W.Clem J.Evenson P.Pyle R.Duldig M.L.Humble J.E.
Category 3: Conference paper

Besides producing the largest ground level enhancement (GLE) in half a century, the relativistic solar particles … detected during the event of January 20, 2005 showed some interesting temporal and directional features, including extreme anisotropy.

Energetic particle observations during the 2000 July 14 solar event. The Astrophysical Journal, 2002 (Ref: 11874)
Authors:
Bieber J.W.Droge W.Evenson P.A.Pyle R.Ruffolo D.Pinsook U.Tooprakai P.Rujiwarodom M.Khumlumlert T.Krucker S.
Category 1: Peer-reviewed literature

Time of solar energetic particle acceleration. International Astronomical Union. 25th General Assembly. Sydney 13-26 July 2003., 2003 (Ref: 11136)
Authors:
Rujiwarodom M.Bieber J.Droge W.Everson P.Pyle R.Ruffolo D.Tooprakai P.Khumlumlert T.
Category 3: Conference paper

Spaceship Earth Observations of the Easter GLE Proceedings of the 28th International Cosmic Ray Conference, Tsukuba, 2003 (Ref: 11111)
Authors:
Bieber J.W.Evenson P.Ruffolo D.Dröge W.Pyle R.Khumlumlert T.Rujiwarodom M.Tooprakai P.
Category 3: Conference paper

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