EXTERNAL FIELDS/EFFECTS

 

The geomagnetic field saw quiet conditions today. The AP level was 7.  High latitude geomagnetic field also saw quiet conditions with AP 9. This concludes the strongest geomagnetic storm in nearly a month since AP reached 24 on May 20. This was followed the next day by the M 7.4 in Qinghai, China, the last major earthquake in the world. Geomagnetic storms of this size are often associated with enhanced global seismicity especially near the geomagnetic equator and at high latitudes and this is likely in the next several days.

 

The geomagnetic field is expected to see disturbed periods June 18 and quiet June 19-20. Solar activity is expected to be at quiet conditions June 18-20, 2021 with a slight chance (10%) of an M-class flare.  SWPC expects a proton storm with 1% likelihood.

 

The maximum disturbance in the geomagnetic field today occurred with KP 4 near 06:00, June 17, 2021.

 

The Wolf Sunspot number today was 12.  Solar radio Flux 10.7 was 75 on June 17, 2021.

 

 

The last major Gamma Ray Burst (GRB) according to the online NASA Swift GRB Catalog was observed on June 18, 2021 at 01:43 UT with BAT Fluence n/a 10-7 erg/cm2 (MAGNITUDE: n/a), Associated earthquakes: Mt Hood, Oregon M 4.0)

 

The last major Gamma Ray Burst (GRB) according to the online NASA Swift GRB Catalog was observed on June 10, 2021 at 19:51 UT with BAT Fluence 360 10-7 erg/cm2 (MAGNITUDE: 15.6), Associated earthquakes: Mt Hood, Oregon M 4.0)

 

The last major Gamma Ray Burst (GRB) according to the online NASA Swift GRB Catalog was observed on June 10, 2021 at 15:03 UT with BAT Fluence 10  10-7 erg/cm2 (MAGNITUDE: n/a), Associated earthquakes: Southern California M 5.3)

 

The last major Gamma Ray Burst (GRB) according to the online NASA Swift GRB Catalog was observed on June 6, 2021 at 03:56 UT with BAT Fluence n/a 10-7 erg/cm2 (MAGNITUDE: n/a), Associated earthquakes: Mt Hood, Oregon M 4.0)

 

SOLAR FLARE ACTIVITY

 

Flare #    START  MAX       END    CLASS     DATE    Flux (Jm-2)

#-------------------------------------------------------------------------------

 

 

SWPC reported no solar flares of B- or higher class on June 17, 2021.  

 

AP INDICIES

 

NOVEMBER 2020

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:  10  3   3  3  4  8   7  5  1   2    4   3   3   3   4                 

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30     

 

AP:    2    3   4    3   8  12  27   8   4   7   7   8  10   6   8    

 

 

DECEMBER 2020

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   2  4   3  2  5  6   3  5  7   8    7   4   5   3   3                 

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30 31     

 

AP:    3    2   3    5   4  12  13  12  10   5   4   6   7   7   9  3 

 

JANUARY 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   4  2   2  3 11 11   6  2  3   3   14   9   4   2   3                 

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30 31     

 

AP:    0    3   4    6   6   3   4   5   5  17  12  11   5   3   2  1  

 

 

FEBRUARY 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   5 17  14  7  6  7  21  6  4   3    4   5  13   4   5                     

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28                

 

AP:   15    8   5   17  20  20  17  12  21  13  11   4   6            

 

MARCH 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:  26 20  26 11  5 16  10  6  3   2    4  12  17  25  10                     

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30  31              

 

AP:    4    5   4    6  29  24   8  11  11  18  12   9   6   4   3  10      

 

APRIL 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   8  6   4  3  5  3  17  5  3   5    6   5   5   7  13                     

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30               

 

AP:   19   29  16   18  13   7   5  15  10  20  14   8   3   6   6          

 

 

MAY 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   5 10   5  4  2  4   3  3  4   6    3  41   7   4   8                       

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30 31               

 

AP:    5    6  10    6  24   7   5   4   4   3  13  16   3   7   6  3            

 

JUNE 2021

 

DATE: 1  2   3  4  5  6   7  8  9  10   11  12  13  14  15

 

AP:   3  5   6  5  4  5  12  5  4   5   10  10   7   4  17                       

 

DATE: 16   17  18   19  20  21  22  23  24  25  26  27  28  29  30               

 

AP:   14    7                                                                     

 

 

AP: