In this directory, you'll find talks (and a couple posters) that I've given recently, usually in PowerPoint, some in HTML.

• "Photospheric Magnetic Evolution in NOAA ARs 10987, 10988, 10989", presented at the 2^nd Whole Heliosphere Interval workshop, Boulder, CO, 11 Nov. 2009

• "How are photospheric flows related to solar flares? (ppt)", presented at the Lockheed-Palo Alto solar group's weekly seminar, 05 Nov. 2009.

• "How are photospheric flows related to solar flares? (ppt)", given in SSL's Space Physics Research Group (SPRG) Seminar, 13 Oct. 2009.

• "Photospheric Flows and Solar Flares (ppt)" (also .pdf), presented at the "Forecasting the All Clear Workshop," Boulder, CO, April 2009.

• "Active Region Flux Dispersal," a poster on the properties of active regions that have reappeared on the disk, presented at the Fall AGU meeting in San Francisco, Dec. 2008.

• The Physical Significance of Time-Averaged Doppler Shifts Along Magnetic Polarity Inversion Lines (PILs), presented at the Time-Distance Helioseismology Mtg. at Stanford, in late July 2008.

• The Magnetic & Energetic Connection Between the Photosphere & Corona, presented at the 2008 SHINE meeting in Zermatt, UT.

• Using Photospheric Flows Estimated from Vector Magnetogram Sequences to Drive MHD Simulations, presented at the SPD/Spring AGU meeting in Fort Lauderdale, FL, late May 2008.

• A talk, Estimating Surface Flows from HMI Magnetograms, presented at the HMI/AIA Teams Meeting in Napa, CA, late March, 2008.

• A talk, What can HMI teach us about flares & CMEs?, presented at the HMI/AIA Teams Meeting in Napa, CA, late March, 2008.

• A poster, Using Photospheric Flows Estimated from Vector Magnetogram Sequences to Drive MHD Simulations, presented at the HMI/AIA Teams Meeting in Napa, CA, late March, 2008.

• A colloquium at SWRI/Boulder, delivered during MTW3 --- the 3rd Magnetic Tracking Workshop --- on 26 July 2007. A README file in the SWRI07 subdirectory gives the URLs of two movies I used in this talk.

• A poster from the 2007 Solar Physics Division (American Astronomical Society) meeting in Honolulu, HI, "Magnetic Field Extrapolations and Current Sheets," by B.T. Welsch, I. De Moortel, J.M. McTiernan.

• From the 2007 Sac Peak Summer Workshop,
  1. My invited talk, "Surface Flows from Magnetograms," B.T. Welsch, W.P. Abbett, G.H. Fisher, M. DeRosa, M.K. Georgoulis, K. Kusano, Y. Li, D.W. Longcope, B. Ravindra, and P. W. Schuck
  2. I summarized some of the points in my talk in a manuscript.
  3. My poster, "On the Origin of Strong Gradients in Photospheric Magnetic Fields," Brian Welsch and Yan Li
  4. I also wrote a manuscript based upon this poster.

• From the 2006 Fall AGU, my invited talk, "How Does Free Magnetic Energy Enter the Corona?" Three movies are also linked in the AGU06/ subdirectory:
  1. Flux emergence in AR 8100.
  2. Filament eruptions near the south pole.
  3. An erupting ring filament.

• From the 2006 CAWSES meeting at the Earth Simulator in Yokohama, Japan, my invited talk, "Forecasting Space Weather with Dynamic Coronal Models." Two movies are also linked in the CAWSES/ subdirectory:
  1. A large-scale movie (.avi,4.3 MB) of MDI full-disk images of AR 8210 over the ~24 hrs. of 01 May 1998.
  2. A smaller-scale version (.mpg, 4.2 MB) of the same movie.

• From the 2006 SHINE meeting at the Zermatt Resort, Midway, UT:
  1. May 1998 Event Session Talks: Free Energy Comparisons in AR 8210
  2. May 1998 Event Session Summary
  3. May 13, 2005 Event (AR 10759) Summary

• From the 2006 HMI/AIA Team Meeting, Monterey, CA:
  1. Mapping Free Energy in the Solar Atmosphere: What can we learn from HMI & AIA?
  2. HMI, Photospheric Flows, and ILCT

• From the 2005 AGU meeting in San Francisco, CA:
  1. Comparisons of Free Energy Estimates in AR 9026

• From the 2004 PROM meeting in St. Andrews, Scotland, 1-3 Sept.
  1. Using Feature Tracking to Quantify Flux Cancellation
  2. Flux Collision Models of Prominence Formation

• From May 1998 SHINE Event talk, given in plenary session in late June 2004 SHINE meeting in Big Sky, MT.
  1. The main PPT file, may98_plenary.ppt
  2. Files linked in this presentation are in here.

• Discussion-starting slides for MURI meeting at UCB, March 2004.

• ILCT review for MURI meeting at UCB, March 2004.

• Seminar given at Lockheed-Martin's Palo Alto site, on a new technique for inferring photospheric flows, I+LCT, in PowerPoint (LMSAL.ppt)

• Invited talk given at September 2003 PROM meeting in Bozeman, MT, in PowerPoint. (Bundled with Pack'n'Go.)

• Invited talk given at July 2003 SHINE meeting in Maui, HI, in PowerPoint. (Both .ppz and .ppt files.)

• Friday Solar Lunch talk on Lionello et al., ApJ. v. 581, p.718, Magnetic Field Topology in Prominences, in HTML

• Friday Solar Lunch talk on Zhang and Low, Apj. v. 584, p. 479, Magnetic Flux Emergence Into the Solar Corona. III. The Role of Magnetic Helicity Conservation, in PowerPoint

• Mar. 13 2002 talk at the Institute for Theoretical Physics, on Magnetic Helicity Transport in the Quiet Sun.