Most earthquakes and volcanic eruptions do not strike randomly but occur in specific areas, such as along plate boundaries. One such area is the circum-Pacific Ring of Fire, where the Pacific Plate meets many surrounding plates.The Ring of Fire is the most seismically and volcanically active zone in the world.n 1991, two volcanoes on the western edge of the Philippine Plate produced major eruptions. On June 15, Mount Pinatubo spewed ash 40 km into the air and produced huge ash flows (also called pyroclastic flows) and mudflows that devastated a large area around the volcano.
Drug interactions may be a possible cause of Arm swelling. 1  Nifedipine and quinidine interaction. 2  Adalat and quinidine interaction. 3  Adalat CC and quinidine interaction.  Nifedical XL and quinidine 1  interaction. Nifeditab CR and quinidine interaction.
Swollen lymph nodes. Your lymph nodes can swell up when infection invades your body, which may be caused by viruses, bacteria or parasites. Other conditions that can cause swelling of the lymph nodes leading to pain under right or left armpit include cancer and autoimmune disorders like rheumatoid arthritis.