Explorer Plate

Explorer
The Explorer Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Vancouver Island, Canada and is partially subducted under the North American Plate.wikipedia
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Farallon Plate

FarallonFarallon oceanic plateFarallon tectonic plate
Along with the Juan De Fuca Plate and Gorda Plate, the Explorer Plate is a remnant of the ancient Farallon Plate which has been subducted under the North American Plate.
The remains of the Farallon Plate are the Juan de Fuca, Explorer and Gorda Plates, subducting under the northern part of the North American Plate; the Cocos Plate subducting under Central America; and the Nazca Plate subducting under the South American Plate.

Pacific Plate

PacificPacific tectonic platePacific crust
The southern boundary is a collection of transform faults, the Sovanco Fracture Zone, separating the Explorer Plate from the Pacific Plate. The Queen Charlotte triple junction is located where the Pacific Plate and North American Plate meets with the Explorer Plate.
The north-eastern side is a divergent boundary with the Explorer Plate, the Juan de Fuca Plate and the Gorda Plate forming respectively the Explorer Ridge, the Juan de Fuca Ridge and the Gorda Ridge.

North American Plate

North AmericanNorth American tectonic plateNorth America
Along with the Juan De Fuca Plate and Gorda Plate, the Explorer Plate is a remnant of the ancient Farallon Plate which has been subducted under the North American Plate. The Explorer Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Vancouver Island, Canada and is partially subducted under the North American Plate.
The Juan de Fuca, Explorer, Gorda, Rivera, Cocos and Nazca plates are remnants of the Farallon Plate.

Explorer Ridge

Explorer spreading centerSouthern Explorer Ridge
To the northwest is a divergent boundary with the Pacific Plate forming the Explorer Ridge, and the Winona Basin located within the northwest boundaries and the Pacific continental shelf.
To its east is the Explorer Plate, which together with the Juan de Fuca Plate and the Gorda Plate to its south, is what remains of the once-vast Farallon Plate which has been largely subducted under the North American Plate.

Nootka Fault

Nootka transform fault
To the southeast is another transform boundary, the Nootka Fault, which separates the Explorer Plate from the Juan de Fuca Plate and forms a triple junction with the North American Plate.
The Nootka Fault lies between the Explorer Plate in the north and Juan de Fuca Plate in south.

Juan de Fuca Plate

Juan de FucaJuan de Fuca tectonic plateJuan de Fuca oceanic plate
Along with the Juan De Fuca Plate and Gorda Plate, the Explorer Plate is a remnant of the ancient Farallon Plate which has been subducted under the North American Plate. To the southeast is another transform boundary, the Nootka Fault, which separates the Explorer Plate from the Juan de Fuca Plate and forms a triple junction with the North American Plate.
The three fragments are differentiated as such: the piece to the south is known as the Gorda Plate and the piece to the north is known as the Explorer Plate.

Queen Charlotte Triple Junction

The Queen Charlotte triple junction is located where the Pacific Plate and North American Plate meets with the Explorer Plate.
The Queen Charlotte Triple Junction is a geologic triple junction where three tectonic plates meet: the Pacific Plate, the North American Plate, and the Explorer Plate.

Sovanco Fracture Zone

Sovanco
The southern boundary is a collection of transform faults, the Sovanco Fracture Zone, separating the Explorer Plate from the Pacific Plate.
It runs between the northern end of the Juan de Fuca Ridge and the southern end of the Explorer Ridge, forming part of the boundary between the Pacific Plate and the Explorer Plate.

Geology of the Pacific Northwest

Geology of OregonGeology of WashingtonPacific Northwest
* Geology of the Pacific Northwest
The small Juan de Fuca Plate and two platelets, the Explorer Plate and Gorda Plate are the meager remnants of the much larger Farallon oceanic plate.

Ring of Fire

Pacific Ring of Firecircum-Pacific orogenic beltPacific Rim
As a part of the Pacific Ring of Fire, the Explorer Plate has a high level of seismic activity.
Eruptions of basaltic to rhyolitic volcanoes and hypabyssal rocks of the Alert Bay Volcanic Belt in northern Vancouver Island are probably linked with the subducted margin flanked by the Explorer and Juan de Fuca Plates at the Cascadia subduction zone.

Pacific Ocean

PacificSouth PacificWestern Pacific
The Explorer Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Vancouver Island, Canada and is partially subducted under the North American Plate.

Vancouver Island

Vancouver Island, British ColumbiaWest Coast of Vancouver IslandNorthern Vancouver Island
The Explorer Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Vancouver Island, Canada and is partially subducted under the North American Plate.

Subduction

subduction zonesubductedsubducting
The Explorer Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Vancouver Island, Canada and is partially subducted under the North American Plate.

Gorda Plate

GordaGorda tectonic plate
Along with the Juan De Fuca Plate and Gorda Plate, the Explorer Plate is a remnant of the ancient Farallon Plate which has been subducted under the North American Plate.

Oceanic basin

ocean basinbasinbasins
In its smoother, southern half, the average depth of the Explorer plate is roughly 2400 m and rises up in its northern half to a highly variable basin between 1400 m and 2200 m in depth.

Transform fault

transform boundarytransformtransform faults
The southern boundary is a collection of transform faults, the Sovanco Fracture Zone, separating the Explorer Plate from the Pacific Plate.

Triple junction

junctionstablethree-armed
To the southeast is another transform boundary, the Nootka Fault, which separates the Explorer Plate from the Juan de Fuca Plate and forms a triple junction with the North American Plate.

Divergent boundary

divergentdivergent boundariesdivergent plate boundaries
To the northwest is a divergent boundary with the Pacific Plate forming the Explorer Ridge, and the Winona Basin located within the northwest boundaries and the Pacific continental shelf.

Shearing (physics)

shearingshearshear deformation
The formation of the Nookta Fault and the shearing of plate boundaries has caused a clockwise rotation, reorienting the Sovanco Fracture Zone northwards along the North American Plate and slowing the Explorer Plate's subduction.

Mid-ocean ridge

spreading centermid-oceanic ridgespreading ridge
The Sovanco Fracture Zone originated as a spreading center offset more than 7 million years ago which shows southward movement from the influence of the Explorer ridge and results in uneven spreading eastward unto the Explorer Plate.

Buoyancy

buoyantbuoyant forcefloat
The relative buoyancy of the subducting plate and the underlying mantle may be inhibiting the Explorer Plate's ability to descend further into the mantle.

Seismic magnitude scales

magnitudeseismic scalebody wave magnitude
However, the activity consists of low-magnitude events; no earthquake above magnitude 6.5 has been recorded in the region, though a swarm of several dozen magnitude 5–6 earthquakes occurred just north of the Seminole Seamount in 2008.

Seminole Seamount

However, the activity consists of low-magnitude events; no earthquake above magnitude 6.5 has been recorded in the region, though a swarm of several dozen magnitude 5–6 earthquakes occurred just north of the Seminole Seamount in 2008.