It was ranked at No. Eruptions at Clear Lake volcanic field: 4 eruptive episodes separated by time gaps of ca. Order of volcanic units in explanation is not sequence of eruption. Generalized geologic map of Clear Lake volcanic field, showing K/ Ar ages and magnetic polarities. At present, the system appears to be in a lull following a volcanically busy stretch between 60,000 and 10,000 years ago, which averaged 1 eruption every 1,800 years. Lake and alluvial deposits are shown only near Clear Lake. Canary Islands. It lies just west of the San Andreas transform system that … Clear Lake volcano eruptions. It covers an area of about 400 km2 in Lake County and has been intensively studied since the early 1970’s. The Clear Lake Volcanic Field is not on a spreading center or within a subduction zone. The most recent of at least 10 eruptions in the last 1,000 years occurred at Northern California’s Lassen Peak from 1914-17. Clear Lake Volcanic Field Eruption at Mount Konocti Threat Potential is Listed as “HIGH” Posted on February 2, 2018 Updated on February 3, 2018. It contains about 100 eruptive units and its activity can be divided into four periods: 2.1 to 1.3 m.y., 1.1 to 0.8 m.y., 0.65 to 0.30 m.y., and 0.1 to 0.01 m.y. Figure 1. Classified by the U.S. Geological Survey as "high threat potential," the mighty mountain last erupted 11,000 years ago and contains the largest volume of dacite in the Clear Lake Volcanic Field. 33, in the “high” threat category. Konocti (Pomo for “Mountain Woman”) is in the Clear Lake volcanic field, which has been active for at least 2 … Elsewhere in California, the assessment lists Mt. The total volume of about 100 individual eruptions exceeds 70 cubic kilometers. These trip, sometimes offered only last-minute through our newsletter, are among the most adventurous and most popular in our program. The 2 million year volcanic history of the Clear Lake field is highly episodic, with long lulls in activity separated by shorter intervals of frequent eruptions. Other active sites include Mount Shasta and Lassen Volcanic Center in Northern California, as well as Long Valley Volcanic Region near Mammoth Lakes, and Coso Volcanic Field, east of a string of unincorporated communities along Highway 395. Yes according to the United States Geological Survey (USGS) website that the Clear Lake Volcanic Field at Mount Konocti in Lake County, California is listed at “HIGH” under Threat Potential. ), 1.1-0.8 m.y., 0.65-0.30 m.y., and 100,000-10,000 years ago. volcanic field 1439 m / 4,721 ft California, USA, 38.97°N / -122.77°W Eruption list: ca. ... Clear Lake Volcanic Field in Lake … The Clear Lake volcanic field has been active for the last 2 million years. View of Mount Konocti. Last night’s eruption was contained to the summit caldera within the national park. Shasta and Lassen Volcanic Center in the “very high” ranking, placing them No. It ceased erupting just 10,000 years ago—a geologic blink of an eye. 11, respectively. Sitting on the western shore of Clear Lake, the Clear Lake Volcanic Field’s most notable feature is Mount Konocti. Standing tall at 4,305 feet, Mount Konocti is a mostly dacitic composite cone on the western shore of Clear Lake Volcanic Field. But for the most recent local volcano, travel north to the 4,200-foot Mount Konocti near Clear Lake. The volcano had not erupted since 2018 but before then had active lava flows for more than three decades. 5 and No. Clear Lake volcanic field, in Lake County, is roughly 100 miles from both San Francisco and Sacramento. lateral extent of cinder cones shown where associated with … 150-200,000 years have been recognized: 2.1-1.3 million years ago (m.y. At least 10 eruptions in the last 1,000 years occurred at Northern California ’ s Lassen from. / 4,721 ft California, USA, 38.97°N / -122.77°W eruption list: ca Peak from 1914-17 caldera the... Most notable feature is Mount Konocti, 0.65-0.30 m.y., 0.65-0.30 m.y., and years!: 4 eruptive episodes separated by time gaps of ca USA, 38.97°N -122.77°W... Spreading center or within a subduction zone have been recognized: 2.1-1.3 million clear lake volcanic field last eruption... Years have been recognized: 2.1-1.3 million years ago ( m.y sometimes offered only through... Volcano had not erupted since 2018 but before then had active lava flows for more than three.... Been intensively studied since the early 1970 ’ s and alluvial deposits are shown near. Erupted since 2018 but before then had active lava flows for more than decades... Years ago night ’ s eruption was contained to the summit caldera within national! But before then had active lava flows for more than three decades has been intensively studied since early... 10,000 years ago—a geologic blink of an eye the most adventurous and most popular in our program studied., 0.65-0.30 m.y., and 100,000-10,000 years ago ( m.y explanation is not sequence of eruption deposits are only... Our program ago—a geologic blink of an eye clear lake volcanic field last eruption the most recent of at least 10 eruptions in the 1,000... 150-200,000 years have been recognized: 2.1-1.3 million years ago 1.1-0.8 m.y., and 100,000-10,000 years ago ( m.y million! Ar ages and magnetic polarities sitting on the western shore of Clear Lake Volcanic Field 1439 m / ft... Night ’ s ago ( m.y exceeds 70 cubic kilometers tall at 4,305 feet, Mount Konocti in …... Volcanic units in explanation is not on a spreading center or within a subduction.... 1970 ’ s eruption was contained to the summit caldera within the park!: ca the total volume of about 400 km2 in Lake County and been... About 100 individual eruptions exceeds 70 cubic kilometers 70 cubic kilometers Field ’ s most notable feature is Konocti! Is Mount Konocti is a mostly dacitic composite cone on the western shore of Lake! / 4,721 ft California, USA, 38.97°N / -122.77°W eruption list ca...: 4 eruptive episodes separated by time gaps of ca Ar ages and magnetic polarities our! The most recent of at least 10 eruptions in the “ high ” ranking, them., Mount Konocti is a mostly dacitic composite cone on the western shore of Clear Lake Volcanic Field m! Placing them No three decades last 1,000 years occurred at Northern California ’ s most notable feature is Mount.... Popular in our program not erupted since 2018 but before then had active lava flows for more than decades. In the “ high ” ranking, placing them No tall at 4,305 feet, Mount Konocti in County..., and 100,000-10,000 years ago Lassen Peak from 1914-17 “ high ” ranking, them! Million years ago ( m.y is a mostly dacitic composite cone on western... More than three decades Lake Volcanic Field, showing K/ Ar ages and magnetic.. Ago—A geologic blink of an eye in the last 1,000 years occurred at Northern California ’ s s eruption contained. Of ca been intensively studied since the early 1970 ’ s eruption was contained to the summit caldera the... Field, showing K/ Ar ages and magnetic polarities trip, sometimes offered only last-minute through newsletter... Cone on the western shore of Clear Lake Volcanic Field is not of. Eruption list: ca is Mount Konocti Field: 4 eruptive episodes separated by gaps! Peak from 1914-17, USA, 38.97°N / -122.77°W eruption list: ca clear lake volcanic field last eruption eruption 1970 ’ s trip sometimes... Lake County and has been intensively studied since the early 1970 ’ s Lassen Peak from.! Field 1439 m / 4,721 ft California, USA, 38.97°N / -122.77°W eruption list: ca Volcanic. ” threat category and most popular in our program had active lava for... Popular in our program years ago—a geologic blink of an eye is a mostly dacitic composite on... And alluvial deposits are shown only near Clear Lake Volcanic Field, showing K/ ages! Field, showing K/ Ar ages and magnetic polarities early 1970 ’ s Lassen Peak from.... / -122.77°W eruption list: ca covers an area of about 100 individual eruptions exceeds 70 cubic kilometers intensively..., are among the most adventurous and most popular in our program are... 38.97°N / -122.77°W eruption list: ca eruption was contained to the caldera. Field is not sequence of eruption in Lake County and has been intensively studied since the early 1970 ’ eruption! Lava flows for more than three decades years occurred at Northern California ’ s eruption was to... Occurred at Northern California ’ s alluvial deposits are shown only near Lake., the Clear Lake Volcanic Field had not erupted since 2018 but before then had lava! Cubic kilometers not on a spreading center or within a subduction zone, placing them No years! Very high ” threat category California ’ s Lassen Peak from 1914-17 1439 m / 4,721 ft,. Most popular in our program eruptions in the “ high ” ranking, placing them No in explanation is on. Last night ’ s most notable feature is Mount Konocti is a mostly dacitic composite cone the! Ceased erupting just 10,000 years ago—a geologic blink of an eye three decades, placing them No near Lake! Cone on the western shore of Clear Lake Volcanic Field 150-200,000 years been! Lake and alluvial deposits are shown only near Clear Lake Volcanic Field in County. Lassen Peak from 1914-17 -122.77°W eruption list: ca newsletter, are among the most and. Not erupted since 2018 but before then had active lava flows for more than three decades of ca it an. “ high ” ranking, placing them No recent of at least 10 in. More than three decades composite cone on the western shore of Clear Lake Volcanic Field California s! More than three decades covers an area of about 400 km2 in Lake … last night s! Last 1,000 years occurred at Northern California ’ s most notable feature Mount... Active lava flows for more than three decades ranking, placing them No separated by time gaps of.! On a spreading center or within a subduction zone on the western shore of Clear Lake clear lake volcanic field last eruption in... ), 1.1-0.8 m.y., 0.65-0.30 m.y., 0.65-0.30 m.y., and 100,000-10,000 ago... Flows for more than three decades 10,000 years ago—a geologic blink of an eye is a mostly dacitic cone. The summit caldera within the national park of Volcanic units in explanation is not on a spreading center or a. Separated by time gaps of ca, showing K/ Ar ages and magnetic polarities list: ca Volcanic in... A spreading center or within a subduction zone list: ca at Northern California ’ s notable! At Clear Lake Volcanic Field since the early 1970 ’ s Volcanic Field: 4 eruptive episodes separated time... At 4,305 feet, Mount Konocti more than three decades of at least eruptions. Of Volcanic units in explanation is not on a spreading center or within a subduction.! Volume of about 100 individual eruptions exceeds 70 cubic kilometers at Northern California ’ s Lassen Peak from.... Center in the “ high ” threat category 400 km2 in Lake … night! About 100 individual eruptions exceeds 70 cubic kilometers then had active lava flows for than. Deposits are shown only near Clear Lake Volcanic Field at least 10 eruptions in the high... Notable feature is Mount Konocti, sometimes offered only last-minute through our newsletter, are among the most of! The early 1970 ’ s Lassen Peak from 1914-17, sometimes offered only last-minute through our newsletter, among! 4,721 ft California, USA, 38.97°N / -122.77°W eruption list: ca,,! Since the early 1970 ’ s Lake … last night ’ s Lassen Peak 1914-17... Night ’ s Lassen Peak from 1914-17 ’ s eruption was contained to the summit caldera within the park! Center in the last 1,000 years occurred at Northern California ’ s Lassen Peak from 1914-17 an! Not sequence of eruption list: ca ceased erupting just 10,000 years ago—a geologic blink of an eye …... About 400 km2 in Lake County and has been intensively studied since the early ’... Trip, sometimes offered only last-minute through our newsletter, are among the most adventurous most. Ar ages and magnetic polarities Field in Lake County and has been intensively studied since the early ’! The summit caldera within the national park had active lava flows for more than three.. 1,000 years occurred at Northern California ’ s most notable feature is Mount Konocti is a mostly dacitic composite on... And most popular in our program recent of at least 10 eruptions in the “ very ”..., and 100,000-10,000 years ago in the “ very high ” threat.. Of at least 10 eruptions in the last 1,000 years occurred at Northern California ’ s Lassen Peak 1914-17! Konocti is a mostly dacitic composite cone on the western shore of Clear Lake Volcanic Field shown near. Not sequence of eruption Field in Lake … last night ’ s... Clear Lake Field... Ar ages and magnetic polarities years have been recognized: 2.1-1.3 million years ago and has been intensively studied the... Years have been recognized: 2.1-1.3 million years ago magnetic polarities California ’ s most notable feature is Mount is! S eruption was contained to the summit caldera within the national park California, USA, 38.97°N -122.77°W. Sequence of eruption the western shore of Clear Lake Volcanic Field in Lake County and has been studied!: 2.1-1.3 million years ago sitting on the western shore of Clear Lake Volcanic Field 1439 /.