Agrigan volcano is an active stratovolcano and the highest of the volcanoes in the Marianas volcanic arc. It contains contains a 500-m-deep, flat-floored caldera. The last confirmed eruption was in 1917. [more]
Anatahan volcano forms the small 9 x 3.7 E-W elongated Anatahan Island in the northern Marianas, about 120 km north of Saipan, the regional Commonwealth of the Northern Mariana Islands capital.
The volcano is at the southern end of the 1500 km long chain of volcanoes forme... [more]
The Kasuga 1 seamount is a conical volcano that rises to within 598 m of the sea surface SE of Fukujin submarine volcano. It was listed as an active volcano by the Japan Meteorological Agency, and floating pumice attributed to a submarine eruption was seen south of the volcano in... [more]
Kasuga 1 is the northernmost of three seamounts in the Kasuga seamount chain. It rises to within about 600 m of the sea surface. Pumice from a submarine eruption was witnessed in 1959. (Image: NOAA, 2003, http://oceanexplorer.noaa.gov/explorations/03fire/logs/mar02/media/kasuga.html)
Approx. 130 km west of Saipan lies a volcanically active submarine spreading zone at water depths of more than 4,000 meters. Evidence of significant volcanic activity from this area has been found recently. [more]
Pagan volcano consists of 2 stratovolcanoes (North and South Pagan) connected by a narrow isthmus and forms the largest and one of the most active of the Mariana Islands. It is located 173 nautical miles north of Saipan.
Nearly all historical eruptions of Pagan, which were... [more]