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.
On December 20, 2016, at about 3:35 PM AKST (00:35 UTC, December 21), Bogoslof volcano began an explosive eruption that lasted about 30 minutes and produced a detached ash cloud that rose to 34,000 ft (10.3 km) above sea level, as reported by several pilots.