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Northeastern Japan arc
English Wikipedia - The Free Encyclopedia
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Northeastern Japan arc
Northeastern Japan Arc
, also
Northeastern Honshu Arc
, is an
island arc
on the
Pacific Ring of Fire
. The arc runs north to south along the
Tohoku region
of
Honshu
,
Japan
. It is the result of the
subduction
of the
Pacific Plate
underneath the
Okhotsk Plate
at the
Japan Trench
. The southern end of the arc converges with the Southwestern Japan Arc and the
Izu-Bonin-Mariana Arc
at the
Fossa Magna
at the east end of the
Itoigawa-Shizuoka Tectonic Line
(ITIL). This is the geologic border between eastern and western Honshu.
Mount Fuji
is at the point where these three arcs meet. To the north, the Northeastern Japan arc extends through the
Oshima Peninsula
of
Hokkaido
. The arc converges in a collision zone with the
Sakhalin island arc
and the
Kuril arc
in the volcanic
Ishikari Mountains
of central Hokkaido. This collision formed the
Teshio
and
Yubari Mountains
.
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