Back الدرجة الدنيا لدلتون Arabic Mínim de Dalton Catalan Daltonminimum German Mínimo de Dalton Spanish Minimum de Dalton French Dalton dị Obere IG Minimo di Dalton Italian ダルトン極小期 Japanese 댈튼 극소기 Korean Daltonminimum Dutch
The Dalton Minimum was a period of low sunspot count, representing low solar activity, named after the English meteorologist John Dalton, lasting from about 1790 to 1830[1] or 1796 to 1820,[2] corresponding to the period solar cycle 4 to solar cycle 7. While the Dalton Minimum is often compared with the Maunder Minimum, its sunspot number was slightly higher and reported sunspots distributed in both solar hemispheres unlike the Maunder Minimum.[3] The coronal streamers are visually confirmed in Ezra Ames and José Joaquin de Ferrer’s eclipse drawings in 1806 and indicates similarity of its magnetic field not with that of the Maunder Minimum but with that of the modern solar cycles.[4]