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Table A.1

List of events where the maximum global polar cap absorption was >2 dB at 30 MHz. Event onset and end are indicated in YYYY–MM–DD HH:MM format. Data were evaluated at 5-min increments. Grey shading indicates events observed during solar maximum years, similar to Figure 2a.

Event onset Event end Event onset Event end
1989-03-12 19:10 1989-03-13 11:25 2002-04-21 04:55 2002-04-21 13:00
1989-03-18 03:15 1989-03-18 04:10 2002-04-21 20:35 2002-04-22 12:30
1989-03-18 07:30 1989-03-19 11:45 2002-04-22 16:40 2002-04-22 17:55
1989-04-11 22:50 1989-04-12 06:10 2002-04-23 04:50 2002-04-23 05:30
1989-04-13 02:10 1989-04-13 08:10 2002-05-23 04:20 2002-05-23 05:05
1989-08-12 19:10 1989-08-15 01:35 2002-05-23 08:50 2002-05-23 11:55
1989-08-15 07:55 1989-08-18 09:50 2002-05-23 15:50 2002-05-23 17:15
1989-08-20 00:25 1989-08-20 10:50 2002-07-17 11:10 2002-07-17 20:00
1989-09-29 13:40 1989-10-01 15:20 2002-08-24 08:20 2002-08-24 09:00
1989-10-19 15:35 1989-10-27 00:20 2002-09-07 16:40 2002-09-07 18:35
1989-11-30 16:00 1989-11-30 23:25 2002-11-10 05:25 2002-11-10 06:35
1989-12-01 02:55 1989-12-02 00:50 2003-05-29 14:30 2003-05-29 19:15
1990-03-19 09:55 1990-03-20 23:00 2003-10-26 19:45 2003-10-27 06:25
1990-05-22 05:20 1990-05-22 08:05 2003-10-28 12:55 2003-10-31 03:15
1990-06-12 17:00 1990-06-12 20:30 2003-11-02 19:25 2003-11-04 11:55
1990-08-01 13:55 1990-08-02 05:25 2003-11-05 07:40 2003-11-05 08:40
1991-01-31 14:00 1991-01-31 22:20 2004-07-26 18:15 2004-07-27 03:05
1991-03-23 10:30 1991-03-26 08:30 2004-09-13 22:00 2004-09-14 15:45
1991-03-26 11:45 1991-03-26 12:25 2004-11-07 20:40 2004-11-08 11:55
1991-05-13 05:55 1991-05-13 15:45 2004-11-08 18:50 2004-11-08 21:00
1991-06-04 14:40 1991-06-04 16:05 2004-11-10 07:10 2004-11-10 11:00
1991-06-06 22:10 1991-06-07 14:25 2004-11-10 16:25 2004-11-10 21:30
1991-06-07 17:50 1991-06-09 02:55 2005-01-16 14:35 2005-01-17 00:15
1991-06-09 16:10 1991-06-09 16:25 2005-01-17 09:25 2005-01-18 23:00
1991-06-10 17:00 1991-06-10 17:40 2005-01-20 07:00 2005-01-20 22:20
1991-06-11 04:50 1991-06-13 10:15 2005-01-21 12:55 2005-01-21 18:30
1991-06-15 10:55 1991-06-16 17:50 2005-05-14 12:35 2005-05-15 06:15
1991-06-16 22:20 1991-06-17 04:20 2005-08-23 00:25 2005-08-24 10:45
1991-06-17 08:05 1991-06-17 11:20 2005-09-09 03:00 2005-09-12 09:20
1991-07-08 03:00 1991-07-09 06:20 2005-09-14 06:25 2005-09-14 20:10
1991-08-27 16:30 1991-08-28 04:45 2005-09-14 23:45 2005-09-15 03:50
1992-05-09 17:20 1992-05-10 10:25 2005-09-15 07:10 2005-09-15 14:45
1992-10-30 20:40 1992-11-01 23:15 2006-12-07 12:00 2006-12-08 20:20
1992-11-02 05:00 1992-11-03 05:25 2006-12-09 15:05 2006-12-09 15:40
1994-02-21 02:50 1994-02-21 12:35 2006-12-13 15:00 2006-12-13 17:00
1997-11-06 19:20 1997-11-07 16:05 2006-12-14 12:05 2006-12-14 17:40
1998-04-20 19:50 1998-04-22 22:40 2011-08-05 17:50 2011-08-05 22:45
1998-08-26 02:45 1998-08-26 19:45 2012-01-23 08:20 2012-01-25 07:20
1998-09-25 01:25 1998-09-25 01:55 2012-01-25 13:25 2012-01-25 17:50
1998-09-30 19:15 1998-10-01 17:00 2012-01-27 23:55 2012-01-28 05:45
1998-11-14 12:15 1998-11-14 15:25 2012-01-28 10:10 2012-01-28 22:50
2000-06-08 09:10 2000-06-08 15:10 2012-03-07 11:20 2012-03-10 05:40
2000-07-14 11:25 2000-07-16 07:35 2012-03-13 19:15 2012-03-14 06:25
2000-07-16 11:25 2000-07-16 13:10 2012-07-14 18:10 2012-07-14 22:10
2000-09-12 22:10 2000-09-13 06:00 2012-07-18 05:30 2012-07-18 06:05
2000-11-09 00:20 2000-11-10 19:40 2013-05-22 20:35 2013-05-23 19:35
2000-11-26 13:40 2000-11-26 23:25 2013-05-23 23:30 2013-05-24 00:20
2001-04-04 18:30 2001-04-04 19:05 2013-09-30 19:35 2013-10-02 02:35
2001-04-11 13:45 2001-04-12 03:35 2014-01-08 12:05 2014-01-09 07:05
2001-04-15 15:35 2001-04-15 16:10 2014-01-09 11:45 2014-01-09 20:30
2001-04-15 22:40 2001-04-16 02:55 2014-04-20 10:55 2014-04-20 11:10
2001-04-18 07:15 2001-04-18 11:25 2014-09-12 15:15 2014-09-12 17:30
2001-09-24 15:25 2001-09-28 17:10 2015-06-22 01:05 2015-06-23 02:10
2001-10-01 20:40 2001-10-02 22:20 2015-06-23 09:40 2015-06-23 10:15
2001-10-03 08:25 2001-10-03 09:15 2017-09-06 23:50 2017-09-07 12:50
2001-11-04 19:35 2001-11-05 00:35 2017-09-07 21:30 2017-09-08 05:50
2001-11-05 04:35 2001-11-07 01:15 2017-09-10 21:25 2017-09-12 12:50
2001-11-23 08:25 2001-11-24 20:15

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