Gema Araujo's H-alpha image on May 5, 2007 at 13:07 of region 10953 showing the flare recorded below.

The above SID plot from the Moore Observatory VLF monitor in Brownsboro, Kentucky showing a nice C4 flare just before 1300UT. It was nice to see both sunspot and flare activity this month. Have a happy solstice.

Michael Hill, SID Analyst 114 Prospect St Marlborough, MA 01752 USA noatak@aol.com

The events listed above meet at least one of the following criteria

1. Event reported by two or more observers within +/- 5 minutes
2. Event matched to GOES-8 XRA event to within +/- 15 minutes and event time < 1000 UT
3. Reported by observer with a high quality rating > 8 (scale 1-10)

May showed a slight increase in SID activity with 10 correlated events reported by observers. A welcome change from the last few months. The solar activity was spread pretty evenly throughout the month with a surge of activity at the beginning and again at mid-month. There were 70 X-Ray flares detected by the GOES satellite. Most of these were lower class events. There were 5 C-Class events and the rest of them were lower B-Class events. Thanks to all our observers for reporting in this month. Your continued observations are appreciated.

Solar Flare Summary Based on GOES-12 Data

Sunspot Data

American Relative Sunspot Numbers(Ra) for May 2007 [boldface = maximum, minimum] Day N Raw Mean Ra 1 30 31 23 2 36 29 23 3 39 19 15 4 34 18 13 5 37 16 12 6 33 13 10 7 32 12 9 8 34 9 7 9 34 16 12 10 39 21 15 11 35 23 16 12 36 21 16 13 35 19 14 14 41 28 21 15 33 27 19 16 30 30 23 17 24 32 25 18 34 36 26 19 30 31 22 20 25 21 15 21 34 17 12 22 35 13 10 23 37 14 10 24 35 3 2 25 31 0 0 26 28 0 0 27 33 2 1 28 33 4 2 29 39 10 7 30 34 8 6 31 30 2 1 Means 33.5 16.9 12.5 Total No. of Observers: 63 Total No. of Observations: 1040

May 2007 Sunspot Observers AAP A. Abbott 19 AJV J. Alonso 21 ARAG G. Araujo 29 BARH H. Barnes 12 BATR R. Battaiola 11 BEB R. Berg 7 BERJ J. Berdejo 11 BMF M. Boschat 18 BRAB B. Branchett 31 BRAD D. Branchett 18 BRAM M. Bradbury 1 BRAR R. Branch 29 BROB R. Brown 30 BVC A. Buck 31 CAMP P. Campbell 3 CHAG G. Morales 28 CKB B. Cudnik 24 CLZ L. Corp 4 CNT D. Chantiles 3 COMT T. Compton 11 DEJV J. van Delft 15 DEMF F. Dempsey 7 DGP G. Dyck 17 DUBF F. Dubois 24 FERJ J. Fernandez 12 FLET T. Fleming 26 FUJK K. Fujimori 25 GFT F. Gobet 6 GOEM M. Goetz 4 HALB B. Halls 7 HAYK K. Hay 22 JENS S. Jenner 3 KAPJ J. Kaplan 26 KNJS J. & S. Knight 12 KROL L. Krozel 3 KUZM M. Kuzmin 13 LARJ J. Larriba 16 LERM M. Lerman 8 LEVM M. Leventhal 25 MCE E. Mochizuki 27 MCHL L. McHenry 2 MEU E. Mason 3 MMI M. Moeller 9 OATS S. Oatney 26 OBSO IPS Observatory 21 PEKT R. Pektas 29 RICE E. C. Richardson 15 RITA A. Ritchie 20 SCGL G. Schott 27 SCHG G. Scholl 18 SDP D. Sharples 2 SIMC C. Simpson 15 STEM G. Stemmler 18 STQ N. Stoikidis 21 SUZM M. Suzuki 27 SZUM M. Szulc 25 TESD D. Teske 28 TJV J. Temprano 9 URBP P. Urbanski 24 VARG A. Vargas 21 VIDD D. Vidican 10 WILW W. Wilson 30 WRP R. Wheeler 1

Reporting addresses: Sunspot Reports Email: solar@aavso.org Postal Mail: AAVSO, 49 Bay State Rd. Cambridge, MA, 02138 Fax: 617-354-0665 SID Flare Reports Email: noatak@aol.com Postal Mail: Mike Hill, 114 Prospect St., Marlboro, MA, 01752

10 cm Solar Flux and American Relative Sunspot Numbers (Ra) for May 2007 (10cm Source: http://www.drao.nrc.ca/icarus)

Smoothed Mean Sunspot Numbers (Rsm) from January 2000 to November 2006 (Waldmeier method).