SOLAR FLARES, X-RAYS SOLAR FLARES, X- -RAYS RAYS SOLAR FLARES, X - - PowerPoint PPT Presentation

SOLAR FLARES, X-RAYS & MUON RATE

September 2005

SOLAR FLARES, X SOLAR FLARES, X-

• RAYS

RAYS & MUON RATE & MUON RATE

September 2005 September 2005

Solar Storm September 7-19, 2005

• 10 X-class solar

flares

– X-class is the highest class energy flare – Maximum: X17 on 09/07

• 26 M-class solar

flares

Muon Analysis 1E-10 1E-09 1E-08 1E-07 1E-06 1E-05 0.0001 0.001 0.01 0.1 1 1000 2000 3000 4000 5000 6000 7000 8000 Time (5 minutes) Muon Rate (Muons/5 minutes) 355 360 365 370 375 380 385 X-Ray Flux l(W/m²) Ray Flux Muon Rate

Sept ’05 Solar Storm: A Glancing Blow

Halloween ’03 Solar Storm: A Direct Hit!

Analysis

• Forbush decrease

– 3-5% – 1 week duration

• Comparison: October

2003 Solar Storm

– 10% decrease – 2 week duration

• ~3 day delay between

solar flare & Muon flux