Macrocytic RBCs are large so tend to have a higher MCH, while microcytic red cells would have a lower value.. MCH is one of three red blood cell indices (MCHC and MCV are the other two). The measurements are done by machine and can help with diagnosis of medical problems.
Alaska's Bogoslof Volcano. Bogoslof volcano, located in the Aleutian Islands about 98 km (61 mi) northwest of Dutch Harbor/Unalaska, is in an active eruption sequence that began in mid-December 2016 and continues today.
Alaska's Aleutian islands, all volcanic in origin and formed from the subduction of the Pacific plate beneath the North American, represent the northern arc of the Ring of Fire. The ring then sweeps down along Russia's Kamchatka Peninsula and through Japan, where the Pacific plate dives beneath the Eurasian plate.