During recorded history, eruptions at Mount Baker have mainly occurred from Sherman Crater. The earliest historical eruption took place in 1843, with more recent eruptions having occurred in 1852-1853, 1854, 1858, 1859-1860, 1863, 1870 and 1880. These eruptions ranked 2 and 3 on the Volcanic Explosivity Index. Possible but unconfirmed eruptions may have also occurred in 1850, 1856, 1860, 1865, 1867, 1869 and 1884.