RHESSI Science Nuggets 200 to 299

299	High Resolution Temporal and Spatial Structure of a White Light Flare
	30 April 2017 by Vasyl Yurchyshyn
The biggest solar telescope finds still smaller scales for white-light flaring - and more. Click the title to read more.

298	Multi-Instrument Solar Flare Observations II: A SC24 retrospective
	10 April 2017 by Ryan Milligan and Jack Ireland
Retrospective searches for other useful observations of your favorite flare - how the widget did in Cycle 24. Click the title to read more.

297	Multi-Instrument Solar Flare Observations I: Solar Flare Finder
	3 April 2017 by Ryan Milligan and Kim Tolbert
Retrospective searches for other useful observations of your favorite flare. Click the title to read more.

296	Suppression of Hydrogen Emission in an X-class White-light Solar Flare
	20 March 2017 by Ondřej Procházka and Ryan Milligan
The absence of hydrogen emission lines in a white-light flare suggests an origin in the deep solar atmosphere.. Click the title to read more.

295	Radio Emissions from Double RHESSI TGFs
	13 March 2017 by Andrey Mezentsev and Thomas Gjesteland
Lightning helps with microsecond timing calibrations, and is really interesting as a phenomenon of high-energy astrophysics.. Click the title to read more.

294	Edward Chupp
	6 March 2017 by RHESSI
. Click the title to read more.

293	Pierre Kaufmann
	19 February 2017 by RHESSI
. Click the title to read more.

292	RHESSI's 15th Anniversary
	13 February 2017 by Brian Dennis, Säm Krucker and Albert Shih
RHESSI celebrates 15 years in orbit. Click the title to read more.

291	Hard X-ray Emission from Partially Occulted Solar Flares
	30 January 2017 by Frederic Effenberger and Fatima Rubio da Costa
Systematic use of occultation lets us observe the corona in hard X-rays. Click the title to read more.

290	GOES Hard X-rays?
	16 January 2017 by Hugh Hudson, Janet Machol, and Rodney Viereck
Solar minimum conditions reveal interesting properties of the GOES X-ray observations. Click the title to read more.

289	Syrovatskii's "constant density" approximation
	30 December 2016 by Hugh Hudson and Paulo Simões
Remembering S.I. Syrovatskii; the relevance of the Shmeleva-Syrovatskii “constant density” approximation has been verified by modern high-resolution observations. Click the title to read more.

288	Statistical Link Between Electrons Emitting X-rays and Type III Radio Bursts
	19 December 2016 by Hamish Reid and Nicole Vilmer
Correlations across the radio and X-ray spectra imply related populations of source electrons. Click the title to read more.

287	KW-Sun: The Konus/WIND Hard X-ray Solar Flare Database
	20 November 2016 by Alexandra Lysenko and the Konus/WIND Team
A Hale Cycle's worth of hard X-ray and soft gamma-ray flare observations. Click the title to read more.

286	Microwave Emission from Twisted Magnetic Fields
	13 November 2016 by Mykola Gordovskyy and Philippa Browning
The inherent magnetic twist of a flaring loop can be inferred from microwave polarization signatures.. Click the title to read more.

285	Spatio-Temporal Dynamics of Flare Hard X-ray Pulsations
	31 October 2016 by Ivan Zimovets, Sergey Kuznetsov, Alexander Morgachev, and Alexei Struminsky
In pulsating flare energy release, the hard X-ray source peaks have different locations.. Click the title to read more.

284	Flare-induced Impulsive Sunspot Rotation caught in High Resolution‎
	24 October 2016 by Chang Liu and Haimin Wang
The tail wags the dog - short time scales for coronal stresses on sunspot structure. Click the title to read more.

283	Hard X-ray Polarimetry from Tian Gong 2‎
	20 October 2016 by Wojtek Hajdas
A novel hard X-ray polarimeter achieves solar "first light". Click the title to read more.

282	A flare in the deep solar atmosphere
	26 September 2016 by Richard Schwartz and Hugh Hudson
RHESSI recently spotted a very fast, very compact, and hot flare event in the deep atmosphere. Click the title to read more.

281	To be or not to be - the role of projection effects in EUV imaging
	16 August 2016 by Karin Dissauer and Manuela Temmer
Perspective matters - application of STEREO views to coronal dimming. Click the title to read more.

280	Solar flare neutrons observed on the ground and in space
	12 August 2016 by Alexander MacKinnon
There has been dramatic progress in studying the Sun via its emission of energetic neutrons. Click the title to read more.

279	Unexpected intensity distributions of solar electrons in the heliosphere
	13 July 2016 by Andreas Klassen and the SEPT/STEREO team
Solar energetic electrons may have complicated and informative distributions in the interplanetary medium. Click the title to read more.

278	Initiation of a type II radio burst without a CME
	4 July 2016 by Pankaj Kumar, Davina Innes, and Kyung-Suk Cho
A global coronal shock wave without a CME driver. Click the title to read more.

277	Spotlessness returns
	27 June 2016 by Hugh Hudson
The Sun had no spots for extended periods in June, 2016. Click the title to read more.

276	RHESSI has resumed operations
	20 June 2016 by Albert Shih, Brian Dennis and Säm Krucker
A successful anneal and RHESSI continues to provide data. Click the title to read more.

275	Non-thermal recombination in solar flares and microflares
	6 June 2016 by Jeffrey Reep and John Brown
A heretofore unrecognized emission mechanism for solar hard X-rays. Click the title to read more.

274	Data-driven radiative hydrodynamic modeling of SOL2014-03-29
	10 May 2016 by Fatima Rubio da Costa
Intense pulses of energy modeled with RADYN. Click the title to read more.

273	Electron acceleration and hard X-ray emission from SOL2013-11-09
	5 May 2016 by Yuri Tsap and Galina Motorina
Testing the thick-target model in an interesting flare. Click the title to read more.

272	Extreme events, stellar evolution, and magnetic reconnection
	30 April 2016 by Hugh Hudson
Stellar activity measured by flare rates over the eons. Click the title to read more.

271	Radio polarization signatures in twisted flare loops
	25 April 2016 by Ivan Sharykin and Alexei Kuznetsov
Flux-rope geometry via radio polarization signs. Click the title to read more.

270	An Unreported White-light Prominence
	28 March 2016 by Matt Penn and Hugh Hudson
Massive flare ejecta observed visually. Click the title to read more.

269	RHESSI's 5th Anneal
	23 February 2016 by Albert Shih and Brian Dennis
RHESSI has begun annealing its detectors, interrupting the flow of data for several weeks. Click the title to read more.

268	A new development in the Frost-Dennis paradigm
	22 February 2016 by Hugh Hudson, Melissa Pesce-Rollins, and Larisa Kashapova
The Fermi/LAT long-duration events look like SOL1969-03-30. Click the title to read more.

267	When the Earth’s atmosphere becomes dynamic…
	13 February 2016 by Manuela Temmer, Sandro Krauss and Astrid Veronig
The Earth's ionosphere reacts strongly to the occurrence of flares and CMEs. Click the title to read more.

266	Hard X-ray Directivity Measurements with STIX and MiSolFA‎
	7 December 2015 by Diego Casadei and Hugh Hudson
Precise stereoscopic observations of hard X-rays can reveal electron beams. Click the title to read more.

265	On the Correlation of HXR and WL Emission in Solar Flares‎
	19 November 2015 by Matej Kuhar
New data sharpen the correlations between hard X-rays and white light, but interesting questions remain open. Click the title to read more.

264	How to better determine the power in non-thermal electrons from observed X-ray spectra
	9 November 2015 by Eduard Kontar, Gordon Emslie, Natasha Jeffrey, and Nic Bian
Incorporation of energy diffusion for electron transport helps with flare energetics. Click the title to read more.

263	Soft and Hard X-rays, Flares, and the Corona
	20 October 2015 by Hugh Hudson
Behavior of the X-ray Sun at low activity levels. Click the title to read more.

262	Fine Structure in Flare Soft X-ray Light Curves
	21 September 2015 by Brian Dennis and Kim Tolbert
A tool that we've had since 1976 now gives us surprisingly precise new information. Click the title to read more.

261	Photospheric Electric Fields and Energy Fluxes in the Eruptive Active Region NOAA 11158
	14 September 2015 by Maria Kazachenko
Flares need magnetic energy. We can now measure its arrival as Poynting flux across the solar photosphere.. Click the title to read more.

260	RHESSI and General Relativity
	7 September 2015 by Bill Thompson and Hugh Hudson
General-relativistic corrections to RHESSI source positions. Click the title to read more.

259	Return-current Model Spectra and Enhanced Plasma Resistivity
	31 August 2015 by Meriem Alaoui and Gordon Holman
A basic return-current model matches RHESSI hard X-ray spectra and implies a need for anomalous resistivity. Click the title to read more.

258	High Energies in the Inner Heliosphere
	24 August 2015 by Hugh Hudson
Cosmic rays measure the coronal magnetic field at the PFSS source surface itself. Click the title to read more.

257	A Two-ribbon White-light Flare Associated with a Failed Solar Eruption
	13 July 2015 by Xin CHENG
The ONSET facility in Yunnan observes an interesting flare event. Click the title to read more.

256	The Fastest Flare
	29 June 2015 by Hugh Hudson and Paulo Simões
A GOES soft X-ray burst lasting less than one minute - with hard X-rays and white-light continuum. Click the title to read more.

255	High-energy Electrons and Electric Currents during a Flare
	22 June 2015 by Sophie Musset, Nicole Vilmer and Véronique Bommier
Photospheric vertical currents linked to sites of electron acceleration in the corona. Click the title to read more.

254	High Dispersion Spectroscopy of solar-type superflare stars
	8 June 2015 by Yuta Notsu
Researching the properties of Kepler's solar-type superflare stars. Click the title to read more.

253	"Superflares" on solar-type stars observed with Kepler
	1 June 2015 by Hiroyuki Maehara
Flare energies 10-1000 times those of the most powerful solar flares. Click the title to read more.

252	EOVSA Coverage of a Recent Gamma-Ray Flare
	11 May 2015 by Dale Gary and Gregory Fleishman
A recent gamma-ray flare observed with Owens Valley microwave imaging spectroscopy. Click the title to read more.

251	Ionospheric Effects, Flare History, and Dick Donnelly
	27 April 2015 by Hugh Hudson and Peter Gallagher
Recognizing the world’s largest X-ray detector, its ionosphere. Click the title to read more.

250	RHESSI Detection of X-ray Emission from a Quiet-Sun Filament Eruption
	13 April 2015 by Gordon Holman and Adi Foord
A RHESSI X-ray flare is detected outside an active region. Click the title to read more.

249	Soft X-ray emission in kink-unstable coronal loops‎
	30 March 2015 by Rui Pinto, Nicole Vilmer, and Sacha Brun
Kinking flux ropes can create flare emission, but their detection may be deceptive. Click the title to read more.

248	Daily solar mm-observations at Aalto University Metsähovi Radio Observatory
	16 March 2015 by Juha Kallunki and Minttu Uunila
Systematic microwave and mm-wave solar observations from Finland. Click the title to read more.

247	Solar Physics during the March 2015 Solar Eclipse‎
	9 March 2015 by Hamish Reid and Hugh Hudson
A total solar eclipse is coming on 2015 March 20, a good opportunity for many observatories. Click the title to read more.

246	Glasgow Callisto and CMEless type II bursts
	16 February 2015 by Peter Wakeford and Hugh Hudson
The Glasgow Callisto telescope observes rare type II bursts without CME drivers. Click the title to read more.

245	Flare Heating by Mildly Non-thermal Particles
	26 January 2015 by Jeffrey Reep
Sorting out nonthermal distributions via HYDRAD models. Click the title to read more.

244	Above-the-Looptop Sources
	12 January 2015 by Mitsuo Oka and Säm Krucker
Electron distribution functions in coronal sources. Click the title to read more.

243	The IAU Solar Target Identifier - A Good Thing
	29 December 2014 by Hugh Hudson and John Leibacher
Standardized names for flares help a lot. Click the title to read more.

242	The Low-High-Low Starting Frequency Trend in Groups of Type III Bursts
	23 December 2014 by Hamish Reid
The type III radio bursts echo the pattern of flare energy release. Click the title to read more.

241	The Solar X-ray Limb II
	24 November 2014 by Marina Battaglia and Hugh Hudson
X-raying the mass distribution at the limb of the Sun: the true solar radius. Click the title to read more.

240	Back from the Far Side
	17 November 2014 by Hugh Hudson and Greg Slater
Active region 2192 has returned as 2209, still no CMEs. Click the title to read more.

239	A Record-Setting CMEless Flare
	27 October 2014 by Sam Freeland and Greg Slater
Active region 2192 produced many huge flares, but no CMEs. Click the title to read more.

238	The Formation of Kappa Distributions in Solar Flares
	13 October 2014 by Nicolas Bian and Duncan Stackhouse
Kappa distributions may form naturally in certain flare environments. Click the title to read more.

237	The Balmer continuum observed from IRIS!
	29 September 2014 by Petr Heinzel and Lucia Kleint
For the first time we have clear and direct observations of the Balmer continuum, from space. Click the title to read more.

236	Energy goes up... but doesn't come back down! Coronal heating?
	22 September 2014 by Brian Welsch
The Poynting flux responsible for coronal heating may have been spotted. Click the title to read more.

235	Which detectors can I use to analyze this flare?
	15 September 2014 by Brian Dennis and Kim Tolbert
A new Browser feature helps to answer this question. Click the title to read more.

234	RHESSI Resumes Observations
	1 September 2014 by Albert Shih and Säm Krucker
Back to normal, the anneal was a success. Click the title to read more.

233	EUNIS Sees Pervasive Faint Fe XIX Emission: Evidence for Nanoflare Heating
	18 August 2014 by Jeff Brosius
Faint emission at flare-like temperatures in a large coronal area. Click the title to read more.

232	Octupolar out-of-plane magnetic field structure generation during magnetic reconnection
	11 August 2014 by Jan Graf von der Pahlen and David Tsiklauri
A new characteristic marker of reconnection. Click the title to read more.

231	Flare Observed by a Dozen Instruments
	28 July 2014 by Lucia Kleint and Kevin Reardon
A wonderful flare observed by a grand set of instruments, including IRIS and IBIS. Click the title to read more.

230	The Redistribution of Nonthermal Electron Energy
	14 July 2014 by Ryan Milligan
Describing what we know about the dominant energy driving a solar flare. Click the title to read more.

229	RHESSI is Annealing Now
	7 July2014 by Albert Shih and Martin Fivian
A fourth repair job for RHESSI, smoothing out radiation damage. Click the title to read more.

228	Mysteries of Flare/CME Initiation
	8 June 2014 by Shaun Bloomfield and Hugh Hudson
Pairs of flares. Click the title to read more.

227	Solar Cosmic Rays, Neutrons, and Fermi Gamma-Rays
	24 May 2014 by Hugh Hudson and Alec MacKinnon
Exciting new solar high-energy observations. Click the title to read more.

226	The 3D standard model for eruptive flares‎
	10 May 2014 by Miho Janvier
Torus instability and slipping reconnection. Click the title to read more.

225	Microwave Images of a Single-Loop Flare: Observations and Simulations
	28 April 2014 by Alexey Kuznetsov and Eduard Kontar
A flare analysis making use of the new GX Simulator modeling software. Click the title to read more.

224	Abundances in Solar Flares
	21 April 2014 by Harry Warren
Wrinkles in the FIP effect for flares. Click the title to read more.

223	Homing in on Flare Energy
	14 April 2014 by Hugh Hudson and Ryan Milligan
Representing the spectral energy distribution of a flare. Click the title to read more.

222	Empirical Constructs and Cartoons
	24 March 2014 by Forrest Mozer and Hugh Hudson
How our mental images may relate to what's really going on. Click the title to read more.

221	Imaging Quasi-Periodic Oscillations in a Simple Flare‎
	17 March 2014 by Zongjun Ning and Hugh Hudson
Time-series imaging spectroscopy in a B8 flare. Click the title to read more.

220	A Wonderful Cycle 24 Flare
	3 March 2014 by Säm Krucker and Hugh Hudson
There have been quite a few Cycle 24 X-class flares, and this was one of the nicest. Click the title to read more.

218	Instantaneous Flare Properties
	10 February 2014 by Hugh Hudson
Let's look at the derivative. Click the title to read more.

217	Reflection of Coronal Global Waves
	13 January 2014 by Ines Kienreich and Hugh Hudson
A homologous series of global coronal waves reflects at a coronal-hole boundary. Click the title to read more.

216	Flare Coronal Rain
	23 December 2013 by Hugh Hudson and Säm Krucker
Thermal collapse in flare loops seen in a wonderful new way. Click the title to read more.

215	The HEROES Mission: High Energy Replicated Optics to Explore the Sun
	16 December 2013 by Steven Christe and Albert Shih
Focusing optics to explore the high-energy Sun. Click the title to read more.

214	CMEs on young, solar-type stars
	9 December 2013 by Alicia Aarnio
Stellar flares and CMEs behave like solar ones. Click the title to read more.

213	The 1859 Space Weather Event Revisited
	25 November 2013 by Ed Cliver
Assessing the greatest space-weather events over the centuries. Click the title to read more.

212	Hard X-ray Footpoint Asymmetry
	7 November 2013 by Ya-Hui YANG
The behavior of conjugacy in flare footpoints. Click the title to read more.

211	The Halloween Flares and Large-Scale Correlations
	28 October 2013 by Richard Schwartz and Hugh Hudson
Flares bunch up strikingly. Click the title to read more.

210	Scattering Polarization in Solar Flares
	21 October 2013 by Jiři Štěpán and Petr Heinzel
Linear polarization produced by anisotropy, rather than particle-beam impact. Click the title to read more.

209	The Flare that Time Forgot
	13 October 2013 by Paulo Simöes and Hugh Hudson
A long-forgotten Masuda flare reappears. Click the title to read more.

208	The Post-Burst Increase
	30 September 2013 by Hugh Hudson
Tutorial on flare thermal sources seen in microwaves. Click the title to read more.

207	Peristaltic Shocks: a model
	16 September 2013 by Dana Longcope and Roger Scott
Reconciling reconnection with high preflare coronal densities. Click the title to read more.

206	Negative Microwave Bursts
	3 September 2013 by Victor Grechnev and Hugh Hudson
Negative microwave bursts happen, in association with flares and "Hyder flares," and modern instrumentation makes them very interesting again. Click the title to read more.

205	Acceleration-region Densities
	6 August 2013 by Säm Krucker and Marina Battaglia
Independent constraints on the densities of ions and non-thermal electrons reveal bulk acceleration. Click the title to read more.

204	Implosion and Oscillation
	29 July 2013 by Paulo Simões and Hugh Hudson
The flare implosion originates in the lower atmosphere and involves GOES soft X-rays. Click the title to read more.

203	Minoflares
	1 July 2013 by Iain Hannah and Hugh Hudson
Earmarks of widespread energetic events in the solar atmosphere. Click the title to read more.

202	Mars Odyssey/HEND and RHESSI
	9 June 2013 by Vadim Vybornov and Michael A. Livshits
An event from far behind the solar limb, observed at Mars. Click the title to read more.

201	Hard X-rays in Descent
	27 May 2013 by Aidan O'Flannagain, John Brown and Peter Gallagher
A novel test of the thick-target model. Click the title to read more.

200	Too few? Too many?
	13 May 2013 by Paulo Simões and Eduard Kontar
Too few electrons in the footpoints; too many electrons in the corona. Click the title to read more.

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