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• Current ACE News: A Surprise Geomagnetic Storm

• ACE News #205: Empirical Modeling of CME Composition Constrained to ACE/SWICS Charge State Distributions

• ACE News #204: Suprathermal Ion Abundance Variations in Corotating Interaction Regions over Two Solar Cycles

• ACE News #203: Some Properties of the Solar-Wind Turbulence at 1 AU Statistically Examined in the Different Types of Solar-Wind Plasma

• ACE News #202: 3He-Rich Solar Energetic Particles from Sunspot Jets

• ACE News #201: The 10 September 2017 and Extreme Events of Solar Cycle 24

• ACE News #200: Database of Small-Scale Magnetic Flux Ropes from ACE In-situ Measurements

• ACE News #199: Global Spectral Curvature of Energetic Protons in GLEs of Solar Cycle 23

• ACE News #198: A Possible Mechanism for Enriching Heavy Ions in 3He-rich Solar Energetic Particle Events

• ACE News #197: Can Solar Flare Neutron-Decay Protons Provide a Seed Population for CME Shock Acceleration?

• ACE News #196: Visualizing Coronal Mass Ejection Flux Ropes in 3-D

• ACE News #195: The Spatial Structure of the Oncoming Solar Wind at Earth and the Shortcomings of a Single Solar-Wind Monitor at L1

• ACE News #194: MMS Observation of Inverse Energy Dispersion in Shock Drift Accelerated Ions

• ACE News #193: Celebrating Two Decades of ACE in Space

• ACE News #192: Longitudinal Distributions of Solar Energetic Particle Heavy Ions

• ACE News #191: Long-Term Trends In The Solar Wind Proton Measurements

• ACE News #190: Analysis of Waves Due to Newborn Interstellar Pickup He+

• ACE News #189: Constraining Solar Wind Heating Processes by Kinetic Properties of Heavy Ions

• ACE News #188: Probing Shock Geometry via the Q/A Dependence of Heavy Ion Spectra at Multiple Spacecraft

• ACE News #187: The Coherent Relation between the in situ Properties and the Coronal Sources of the Solar Wind

• ACE News #186: Q/M-Dependence of Heavy Ion Spectral Breaks in Large SEP events

• ACE News #185: Anomalous Composition in Slow Solar Wind and ICMEs as Observed by ACE/SWICS

• ACE News #184: Evidence for a Common Acceleration Mechanism for 3He and Heavy-ion Enrichments in Impulsive SEP events

• ACE News #183: Behavior of Fe and O Spectra in Large Solar Energetic Particle Events

• ACE News #182: Seed Population in Large Solar Energetic Particles (SEPs) and the Twin-CME Scenario

• ACE News #181: Discovery of Magnetic Waves due to Newborn Interstellar Pickup He+

• ACE News #180: Compressive Acceleration of Solar Energetic Particles (SEPs) Within Coronal Mass Ejections (CMEs)

• ACE News #179: Solar Sources of ³He-rich Solar Energetic Particle Events

• ACE News #178: ACE/CRIS Detects Rare Radioactive Nuclei - ⁶⁰Fe - in Galactic Cosmic Rays

• ACE News #177: New and Updated Ion Composition Data Products from SWICS

• ACE News #176: New ACE/MAG Data Product to Aid in the Search for Waves

• ACE News #175: Neon and Oxygen Abundances in the Solar Corona

• ACE News #174: Triangular Distributions of SEP Peak Intensities vs. CME speeds: Implications for Real-Time Space Weather Applications

• ACE News #173: Ne/O over the Solar Cycle

• ACE News #172: Coronal Electron Temperature in the Protracted Solar Minimum, the Cycle-24 Mini-Maximum, and over Centuries

• ACE News #171: 3He-rich SEP Events and Stream Interaction Regions at Solar Minimum

• ACE News #170: Longitudinal Distribution of Solar Energetic Heavy Ions

• ACE News #169: Long-Lasting 3He-Rich Solar Energetic Particle Sources

• ACE News #168: Impulsive Events with High Charge State Fe at Low Energies: Occasional High Temperature Source Material!

• ACE News #167: An Analysis of Heliospheric Magnetic Field Flux, Prediction for the Coming Solar Minimum, and Alfvén Radius based on Sunspot Number from 1749 to Today

• ACE News #166: Fe Enhancements in SEP onsets: Flare/CME Mixture or Transport Effect?

• ACE News #165: Weakest Solar Wind of the Space Age and the Current "Mini" Solar Maximum

• ACE News #164: Decline and Recovery of the Interplanetary Magnetic Field During the Protracted Solar Minimum

• ACE News #163: Global Distributions of Three Types of Solar Wind During the Entire Solar Cycle

• ACE News #162: Deficit of Suprathermal 3He in Solar Cycle 24

• ACE News #161: The Kp index and solar wind speed relationship: Insights for improving space weather forecasts

• ACE News #160: Galactic Cosmic-Ray Composition During Solar Minimum Periods

• ACE News #159: Solar Wind Heavy Ions over the Solar Cycle

• ACE News #158: Advance Warning of High-Speed Ejecta Based on Real-Time Shock Analyses

• ACE News #157: Evidence for Local Acceleration of CIR-Associated Suprathermal Particles at 1 AU

• ACE News #156: A New Explanation of Energy-Shift Phenomena in Solar Energetic Particles

• ACE News #155: Solar Modulation of Cosmic-Ray Element Spectra at 1 AU

• ACE News #154: Celebrating 15 years of ACE in Space

• ACE News #153: Messenger and ACE Measurements of the Interstellar Helium Gravitational Focus Cone

• ACE News #152: Prompt SEP Onsets from Backside Solar Events

• ACE News #151: The Variable Width and Intensity of Solar Wind Suprathermal Electron Strahl: Scattering Differs with Solar Wind Conditions

• ACE News #150: Interplanetary Turbulence During the Recent Protracted Solar Minimum

• ACE News #149: Solar Cycle Abundance Variations in Corotating Interaction Regions: Evidence for a Suprathermal Ion Seed Population

• ACE News #148: Longitudinal Dependence of Peak Intensities in Solar Energetic Particle Events

• ACE News #147: Gamma-Ray Observations Confirm ACE Conclusions that Cosmic Rays are Accelerated in OB Associations and their Superbubbles

• ACE News #146: Dropping Coronal Temperatures in the Protracted Cycle 23-24 Solar Minimum

• ACE News #145: The Return of Energetic 3He in the Inner Heliosphere

• ACE News #144: Solar Wind Sonification

• ACE News #143: Radial Variation of the Solar Wind Temperature-Speed Relationship

• ACE News #142: Active Reconnection by a Quiet Sun

• ACE News #141: Using Ionic Charge States as a Thermometer in the Solar Corona

• ACE News #140: Modeling Solar Energetic Particles using ACE and STEREO Observations of the April 3, 2010 Event

• ACE News #139: Multi-spacecraft Observations of an Energetic Electron Event from 0.3 to 1.0 AU: ACE, MESSENGER, and STEREO A/B

• ACE News #138: Ion-Proton Differential Streaming in the Solar Wind

• ACE News #137: Broad Longitudinal Spread of ³He from Impulsive Solar Energetic Particle Events

• ACE News #136: Anomalous Cosmic Ray Behavior at 1 AU During the Unusual Solar Minimum

• ACE News #135: Heavy-Ion Ionic Charge States: Tracing the Source Population for Interplanetary Shocks

• ACE News #134: Update on Record-Setting Galactic Cosmic Ray Intensities in 2009-2010

• ACE News #133: Current Sheets as Intermittent Structures: ACE/MAG Observations

• ACE News #132: Spatial Offsets of Interplanetary Ion and Electron Source Regions

• ACE News #131: The Sun Erupts from its Lengthy Slumber

• ACE News #130: Direct Measurement of the Turbulent Cascade in Interplanetary Space

• ACE News #129: New Merged Data Set for Enhanced Solar Wind Proton Data from ACE

• ACE News #128: First-time measurement of ACR O gradients during an A<0 period in the inner heliosphere

• ACE News #127: Ionic Charge State Distributions as a Diagnostic of Diverse SEP Sources

• ACE News #126: 3He-Rich Solar Energetic Particle Events from the nearly Quiet Sun in 2007-08

• ACE News #125: Reservoirs of Near-Relativistic Electrons in the Inner Heliosphere: ACE and Ulysses Observations

• ACE News #124: Unusually Cold Material Found Inside ICMEs

• ACE News #123: Nonuniformity of Spectral Indices in the Inertial Range

• ACE News #122: Cosmic-Ray Fe Intensity Reaches Record Levels in 2008-2009

• ACE News #121: A One-Sided Aspect of Alfvénic Fluctuations in the Solar Wind

• ACE News #120: Fractionation and Ionic Charge States in 3He-rich Solar Particle Events

• ACE News #119: Acceleration of multiple seed populations at CME-driven interplanetary shocks near 1 AU

• ACE News #118: Automated Real-Time Shock Analysis for Space Weather Alerts

• ACE News #117: Solar Cycle Variations in Observed Galactic Cosmic Ray Composition

• ACE News #116: Highly-Ionized Fe Found at Low Energies in Solar Energetic Particles: Acceleration of Hot Material?

• ACE News #115: Solar Injection Histories of Near-Relativistic Solar Electrons

• ACE News #114: Cometary X-Ray Emission: Using Comets as Natural Solar Wind Probes

• ACE News #113: Abundances and Energy Spectra of CIR Heavy Ions During Solar Cycle 23

• ACE News #112: An Extended Magnetic Reconnection X-line in the Solar Wind

• ACE News #111: The Origin of Energetic 3He in the Inner Heliosphere

• ACE News #110: Energy Spectra of ACR Oxygen during the Approach to Solar Minimum

• ACE News #109: Celebrating 10 Years of ACE in Space

• ACE News #108: Energy Cascade in the Solar Wind

• ACE News #107: Energy-Dependent Charge States in Impulsive Solar Particle Events: A Clue to the Source Location and Conditions

• ACE News #106: Global Distribution of Slow Solar Wind during Solar Cycle 23

• ACE News #105: Prolonged Reconnection at an Extended and Continuous X-line in the Solar Wind

• ACE News #104: Elemental Abundances of Low-energy Heavy Ions in Large Solar Energetic Particle Events of Cycle 23

• ACE News #103: Classification of ACE/EPAM Near-Relativistic Electron Beam Events

• ACE News #102: Superbubble Origin of Galactic Cosmic Rays Supported by Supernova-Produced Isotopes

• ACE News #101: STEREO Joins ACE to Witness the Last (?) Large SEP events of Cycle 23

• ACE News #100: Automated Shock Detection and Analysis Software for Real-Time Application

• ACE News #99: Charge States Reveal Multiple Sources in Large Solar Energetic Particle Events

• ACE News #98: Common Suprathermal Tail Spectra at 1 AU

• ACE News #97: The Origin of Suprathermal Electron Depletions in the Solar Wind

• ACE News #96: Coronal Holes, Jets, and the Origin of ³He-Rich Solar Energetic Particle Events

• ACE News #95: Measurements Support O-B Association Origin of Galactic Cosmic Rays

• ACE News #94: New Solar Wind Data Products

• ACE News #93: Effects of Interplanetary Shocks on Energetic Particles

• ACE News #92: Ultraheavy Elements in Solar Particles with >10 MeV/nucleon

• ACE News #91: Wave Activity near Interplanetary Traveling Shocks: Excitation of Alfven and Ion Whistler Waves

• ACE News #90: Evidence for Preferential Mass per Charge Dependent Acceleration Prior to Stripping in Impulsive Events

• ACE News #89: Determination of Dissipation Range Spectra in the Solar Wind

• ACE News #88: Magnetic Disconnection From the Sun

• ACE News #87: Space Weather Aspects of the January 20, 2005 Solar Energetic Particle Event

• ACE News #86: Real-time Solar Wind Data from ACE make Accurate Forecasts of Magnetic Storms a Reality

• ACE News #85: Direct Evidence for Reconnection in the Solar Wind near 1 AU

• ACE News #84: ACE Plasma Composition Measurements Provide a Tool for the Identification of Interplanetary Coronal Mass Ejections

• ACE News #83: An Overview of Cosmic-Ray Elemental Composition

• ACE News #82: How CMEs Control Energetic Electron Propagation

• ACE News #81: The Abundances of Heavy and Ultra-Heavy Ions in 3He-rich Solar Flares

• ACE News #80: Surprisingly Low and Energy-Dependent Charge States in Impulsive Solar Energetic Particle Events

• ACE News #79: No Variability of N/O in the Solar Wind Implies non-Solar Origin of Lunar Nitrogen

• ACE News #78: Coupled Dispersionless Modulations in Solar Electron Bursts and the Solar Wind Strahl

• ACE News #77: Upper Limit on ³He Fluence in Solar Energetic Particle Events

• ACE News #76: Very Low-Energy Solar Electron Bursts and Solar Wind Structure

• ACE News #75: Merged Interaction Regions (MIRs) at 1 AU

• ACE News #74: Galactic Cosmic Ray Neon and Iron-Group Isotopic Abundances Agree with Wolf-Rayet Star Model

• ACE News #73: Interstellar and Heliospheric Parameters derived from Observations of Pickup Helium in the Focusing Cone

• ACE News #72: Correlation of Solar Particle Onsets with the 3He/4He Ratio

• ACE News #71: Evidence for a suprathermal seed population of heavy ions accelerated by interplanetary shocks near 1 AU

• ACE News #70: Energetic He+: The 3rd Most Abundant Ion - Source and Acceleration

• ACE News #69: Highly-Fractionated Impulsive Solar Flare Events

• ACE News #68: Forecasting Space Weather: Predicting Interplanetary Shocks before they arrive at ACE

• ACE News #67: Suprathermal Electrons in High-Speed Streams: Counter-Streaming on Open Field Lines at 1 AU

• ACE News #66: A Double Flux-Rope Magnetic Cloud

• ACE News #65: Direct Evidence for Variation in the Energy Loss of Galactic Cosmic Rays due to Changing Levels of Solar Modulation

• ACE News #64: Near-Relativistic Electron Events Accelerated by CMEs

• ACE News #63: Composition and Charge State Structure of Magnetic Clouds

• ACE News #62: A New Heavy Ion Abundance Enrichment Pattern in 3He-Rich Solar Particle Events

• ACE News #61: Spectral Variability in Large Solar Energetic Particle Events

• ACE News #60: Charge States of Energetic Particles in Corotating Interaction Regions

• ACE News #59: Composition Variations at Low Energies during Large SEP Events

• ACE News #58: An Improved Model of the Galactic Cosmic Ray Radiation Environment

• ACE News #57: November, 2001 Features Two of the Largest Solar Particle Events of Solar Cycle 23

• ACE News #56: Solar Wind Electron Halo Depletions at 90° Pitch Angle

• ACE News #55: Shock Characteristics of Expanding ICMEs

• ACE News #54: Energetic Particle Fluences from Solar Wind to Cosmic Ray Energies

• ACE News #53: Survey of Electron Events Provides Evidence of Acceleration by Coronal Shocks

• ACE News #52: High Charge States of Iron as a Tracer of Interplanetary Coronal Mass Ejections

• ACE News #51: The Disappearance of ACR Oxygen with Solar Maximum; ACE/SIS

• ACE News #50: Relating Solar Wind Plasma to its Coronal Sources using In Situ Charge State Information

• ACE News #49: Revisiting the Day the Solar Wind Almost Disappeared; ACE/MAG

• ACE News #48: Oxygen Isotopes in the Fast Solar Wind; ACE/SWIMS

• ACE News #47: Energy-Dependent Electron-Capture Decay Observed in Galactic Cosmic Rays; ACE/CRIS

• ACE News #46: Energetic Electrons in 3He-Enhanced Solar Energetic Particle Events

• ACE News #45: What is driving CME expansion in the low corona?

• ACE News #44: 3He Enhancements at Interplanetary Shocks: ACE/ULEIS

• ACE News #43: A coronal mass ejection (CME) observed in the solar wind by both ACE (1 AU) and Ulysses (5 AU)

• ACE News #42: Forecasting Shock-Accelerated Energetic Particles with ACE

• ACE News #41: Heavy Ion Charge State Measurements over an Extended Energy Range with ACE and SOHO: ACE/SEPICA

• ACE News #40: The Near Disappearance of the Solar Wind: ACE/SWEPAM

• ACE News #39: Fluctuation Anisotropy within Magnetic Clouds: ACE/MAG

• ACE News #38: Solar Wind Nitrogen: SWIMS

• ACE News #37: Abundances of Iron, Cobalt, and Nickel Isotopes Suggest Cosmic Rays Originate from Interstellar Matter

• ACE News #36: Tracing Solar Wind Matter in the Magnetosphere: ACE-SWICS and Polar-CAMMICE Results

• ACE News #35: Variability of 22Ne/20Ne at 1 MeV/nucleon Measured by ACE/ULEIS

• ACE News #34: A Cool Ion Beam Observed Upstream of an Interplanetary Shock

• ACE News #33: Charge State Variations between Impulsive and CME Related Solar Energetic Particle Events

• ACE News #32: Possible Connection between Solar Supergranulation and Temporal Variations of Solar Energetic Particles

• ACE News #31: Non-radial IMF connection between the Earth's bow shock and L1

• ACE News #30: Correlated Isotopic and Elemental Fractionation of Solar Energetic Particles

• ACE News #29: Do Magnetic Holes Originate in the Corona?

• ACE News #28: Solar Wind Sulfur Isotopes: SWIMS

• ACE News #27: Copper and Zinc Isotopes Resolved in CRIS

• ACE News #26: How Much Do Field Lines Mix in the Solar Wind?

• ACE News #25: Interplanetary Propagation of Ions From Impulsive Solar Flares

• ACE News #24: A prolonged Enhancement of He⁺ in a CME : ACE/SWEPAM Observations

• ACE News #23: Ionic Charge States in 3He-rich Solar Energetic Particle Events

• ACE News #22: Variations in the ²²Ne/²⁰Ne Ratio in Solar Energetic Particles

• ACE News #21: Simultaneous Observations of Upstream Events at ACE and WIND

• ACE News #20: Dissipation of Magnetic Turbulence in the Interplanetary Medium

• ACE News #19: Solar Wind Isotopes in the May 3, 1998 CME: SWIMS Data

• ACE News #18: NOAA Implements First Derived Product based on RTSW Data, a Predicted Kp for use in Space Weather Forecasting

• ACE News #17: CRIS Data Indicate a Long Delay Between Nucleosynthesis and Cosmic Ray Acceleration

• ACE News #16: High Time Resolution Measurements of a CME: SWICS/ACE Observations

• ACE News #15: Correlated Heavy Ion Intensity Variations Contained Within a CME: ACE SWEPAM -i Data

• ACE News #14: Indication of Charge State Variation During the November 1997 Solar Particle Events (SEPICA)

• ACE News #13: Evidence for the Rare Isotopes ²²Ne and ¹⁸O in Anomalous Cosmic Rays (SIS)

• ACE News #12: An Upstream Magnetospheric Event Observed by EPAM

• ACE News #11: Observations of a "Magnetic Cloud" by the MAG and SWEPAM Sensors Aboard ACE

• ACE News #10: First Measurements of the Solar Wind Composition with the High Resolution Mass Spectrometer (SWIMS)

• ACE News #9: Radioactive Clock Isotopes Observed With CRIS

• ACE News #8: Inauguration of the ACE Real-Time Solar Wind System (RTSW)

• ACE News #7: Early Data from the Solar Wind Ion Composition Spectrometer(SWICS)

• ACE News #6: Early Data from the Ultra-Low Energy Isotope Spectrometer(ULEIS)

• ACE News #5: Isotope Measurements from the 11/6/97 Solar Particle Event (SIS)

• ACE News #4: Helium-3-Rich Solar Particle Events Observed by SEPICA

• ACE News #3: Early Data from EPAM, the ACE Electron, Proton and Alpha Monitor

• ACE News #2: First Data from the Magnetometer Instrument(MAG)

• ACE News #1: First Data from the Cosmic Ray Isotope Spectrometer(CRIS)
  

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Last modified 31 Aug 2007.