Solar Field Mapping and Dynamo Behavior

Table 1

Wilcox [34] suggested that the interplanetary field (IMF) showed a monopole-like behavior, when the IMF, or its proxy, showed time intervals when it was predominantly pointed towards or away from the Sun for a good fraction of a solar rotation. Svalgaard [41] shows the following time periods with unipolar patterns.

Year	month	day	Bartels no.	IMF sign: away +, towards X, mixed polarity *
1954	06	13	1656	X+++++++XXX+++++++++X++++++
1954	07	10	1657	+X++++XXX+++++++++++++++X++
1954	08	06	1658	+++++++++X+++++++++++++++++
1954	09	02	1659	+*+++++++++++++++++++++++++
1954	09	29	1660	+++++++++++++XXX+X++++++*++
1965	05	22	1804	X*XXX+++++XXXXXXXXX++++XXX+
1965	06	18	1805	+XX+XXX+++XXXXXXXX++XXXXXXX
1965	07	15	1806	XXX+XXXX++++XXXXXXXXXXXXXX+
1965	08	11	1807	XXXXXXXX++++*XXXXXXXXXXXXXX
1967	05	21	1831	X+X++XXX+**XXXX+XXXXXXXXXXX
1967	06	17	1832	XXX+XXX++XXXXX++XXXX++++XXX
1967	07	14	1833	XXXXXXXXXXXXXXXXXX+*X+++++X
1967	08	10	1834	XXXXXXXXXXXXXXXXXXXX*++++++
1967	09	06	1835	+XXXXXXXXXXXXXXXX+*XX++++++
1967	10	03	1836	XXXXXX+*XXXXXXXXXXXXX*+++XX
1967	10	30	1837	+XXXX+++XXXXX*XXXXXXXX++*++
1987	01	18	2097	++++++++++++++++++++++++*++
1987	02	14	2098	+++++++++++++++++++++++++++
1987	03	13	2099	+++++++++++X+++++++X+*+++++
1987	04	09	2100	++++++++++++++++++*++*+++++
1995	12	29	2218	++*XXXX*+*XXXXXXXXXXX*+X+++
1996	01	25	2219	XXXXXXXXX*XX*X*XXXXXXX+*+XX
1996	02	21	2220	*XXXX*X*XX*XXXX++XXXXXXX+X*
1996	03	19	2221	*XXXXXXX*XX**XX+X*+++XXXXXX
1996	04	15	2222	XXXXXXXXXXX+++++X+X+XXXX+++
1996	05	12	2223	+XXXXX+XXXX++XX*+*XXXXX*+++
1997	02	06	2233	**++X++XXXXXX**XXXXX+XXXXXX
1997	03	05	2234	+++++++XXXXXXX+++XXX*XXXXXX
1997	04	01	2235	+XXXXXXXXXX++++XXXXXXXX*X*X
1997	04	28	2236	++XXXXXXXXXXX+++X+XXX*+++XX
2010	06	25	2414	*XXXXXXXXXXXX*+++XX*++++XX+
2010	07	22	2415	+XXXXXXXXXXXXXXX*X++++XX+++
2010	08	18	2416	++*XXXXXXXXXXXXXXXX+++*XXX*
2010	09	14	2417	+*XXX*X*XXXXXXXXXXXXX+++XX*