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On 17 June JMA lowered the Alert Level for Azumayama to 1 (the lowest level on a 5-level scale), noting that deformation and elevated seismicity recorded in May had stabilized and decreased, respectively.
Source: Japan Meteorological Agency (JMA)
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Short-term increase in seismic activity during April-May 2001
On 29 May 2001 the Fukushima Local Meteorological Observatory reported that seismicity increased slightly beneath Azuma during the month. The seismic network maintained by the Coordinating Committee for the Prediction of Volcanic Eruptions detected 51 small volcanic earthquakes during 21-22 May and 39 events on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, and 40 were detected in April. The observatory last reported that by 22 May, local residents had felt 33 earthquakes.
Information Contacts: Volcanological Division, Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan; The Japan Times; 5-4, Shibaura 4-chome, Minato-ku, Tokyo 108-0023, Central P.O. Box 144, 352, Tokyo 100-8691 (URL: http://www.japantimes.co.jp/).
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On 17 June JMA lowered the Alert Level for Azumayama to 1 (the lowest level on a 5-level scale), noting that deformation and elevated seismicity recorded in May had stabilized and decreased, respectively.
Source: Japan Meteorological Agency (JMA)
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The number of volcanic earthquakes at Azumayama increased on 5 May and data from a tiltmeter about 1 km SE of Ohana Crater showed inflation on 9 May, prompting JMA to raise the Alert Level to 2 (on a 5-level scale). Field observations on 7 and 10 May indicated no changes in the fumarolic and thermal areas around Ohana. Seismicity began to decrease on 10 May, though continued to fluctuate through 20 May. Deformation continued but at a slower rate.
Source: Japan Meteorological Agency (JMA)
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On 29 May the Fukushima Local Meteorological Observatory reported that seismic activity increased slightly beneath Azuma during May. The Coordinating Committee for the Prediction of Volcanic Eruptions' seismic network detected 51 small-magnitude volcanic earthquakes during 21 and 22 May and 39 on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, while 40 were detected in April.
Source: The Japan Times
Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.
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Small ash ejection in December
The number of volcanic earthquakes at Azuma, including some felt events, began to increase in September and continued at an increased rate in October. On 26 October, the fume cloud rose about 400 m from Oana Crater on the SE flank of Issaikyo, one of the numerous stratovolcanoes that comprise the Azuma complex. Mud and sand spattering began, and fist-sized blocks were thrown 20 m above the crater. Active fuming continued through November.
A brief eruption from Oana was observed during the early morning of 7 December from Fukushima Meteorological Observatory, about 20 km to the E. The ash cloud rose 500-1,000 m above the crater and produced a slight ashfall nearby. Similar ash ejections occurred through the end of December.
Information Contacts: JMA, Tokyo; Y. Sawada, Meteorological Research Institute, Tokyo; D. Shackelford, USA.
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Continued phreatic activity
Steam and ash emissions continued in January, with plumes rising 300-500 m from Oana crater.
Information Contacts: JMA, Tokyo; D. Shackelford, USA.
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Small-amplitude volcanic tremor
Small-amplitude volcanic tremors were detected on 26 April and 26 May. The last eruption occurred in December 1977. Earthquakes began in September 1977, followed by mud and sand spattering and ejection of small blocks in October, and active fuming in November. The small eruption on 7 December 1977 sent ash 500-1,000 m above the crater and produced minor ashfall. Similar ash ejections occurred through January 1978 (SEAN 03:01 and 03:02).
Information Contacts: Japan Meteorological Agency (JMA), Volcanological Division, Seismological and Volcanological Department, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan.
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Small-amplitude volcanic tremor
Small-amplitude volcanic tremors were detected on 10, 17, and 30 June, and on 27 July.
Information Contacts: Volcanological Division, Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan
Cite this Report
Short-term increase in seismic activity during April-May 2001
On 29 May 2001 the Fukushima Local Meteorological Observatory reported that seismicity increased slightly beneath Azuma during the month. The seismic network maintained by the Coordinating Committee for the Prediction of Volcanic Eruptions detected 51 small volcanic earthquakes during 21-22 May and 39 events on 21 May (the most recorded in one day since November 1998). During March four low-frequency tremor events were recorded, and 40 were detected in April. The observatory last reported that by 22 May, local residents had felt 33 earthquakes.
Information Contacts: Volcanological Division, Japan Meteorological Agency, 1-3-4 Ote-machi, Chiyoda-ku, Tokyo 100, Japan; The Japan Times; 5-4, Shibaura 4-chome, Minato-ku, Tokyo 108-0023, Central P.O. Box 144, 352, Tokyo 100-8691 (URL: http://www.japantimes.co.jp/).
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
Synonyms |
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| Azuma | ||||
Cones |
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| Feature Name | Feature Type | Elevation | Latitude | Longitude |
|
Azuma-Kofuji
Azuma-Kohuzi |
Cone | 1705 m | ||
| Higashi-Azuma | Cone | 1975 m | 37° 44' 0" N | 140° 15' 0" E |
| Higashi-Daiten | Cone | 1928 m | ||
| Iegata-yama | Cone | |||
| Issaikyo | Cone | 1949 m | ||
| Kabuto-yama | Cone | 1893 m | ||
| Naka-Azuma | Cone | 1931 m | ||
| Nishi-Azuma | Cone | 2035 m | 37° 44' 0" N | 140° 9' 0" E |
| Nishi-Daiten | Cone | 1982 m | ||
|
Taka-yama
Ko-yama |
Cone | 1805 m | ||
Craters |
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| Feature Name | Feature Type | Elevation | Latitude | Longitude |
|
Goshiki-numa
Gosiki-numa |
Crater | 1760 m | ||
| Menuma | Crater | 600 m | ||
| Oana | Crater | |||
| Oke-numa | Crater | 1600 m | ||
Domes |
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| Feature Name | Feature Type | Elevation | Latitude | Longitude |
| Nusuyu | Dome | |||
| Takayu | Dome | |||
| Tuchiyu | Dome | |||
| Ubayu | Dome | |||
|
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There is data available for 19 confirmed Holocene eruptive periods.
1977 Dec 7 - 1977 Dec 7 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (Oana) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1977 Dec 7 - 1977 Dec 7 | Evidence from Observations: Reported | ||||||||||||||||||||||||
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List of 3 Events for Episode 1 at Issaikyo (Oana)
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[ 1966 May 16 ± 15 days - 1966 Aug 16 ± 15 days ] Uncertain Eruption
| Episode 1 | Eruption | Issaikyo (Oana) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1966 May 16 ± 15 days - 1966 Aug 16 ± 15 days | Evidence from Unknown | ||||||||||||||||||||||||
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List of 3 Events for Episode 1 at Issaikyo (Oana)
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[ 1952 Jun 18 ] Uncertain Eruption
| Episode 1 | Eruption | Issaikyo | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1952 Jun 18 - Unknown | Evidence from Unknown | |||||||||||||||||||
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List of 2 Events for Episode 1 at Issaikyo
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1950 Feb 10 - 1950 Feb 19 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (Oana and NW of Oana) | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950 Feb 10 - 1950 Feb 19 | Evidence from Observations: Reported | |||||||||||||||||||||||||||||
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List of 4 Events for Episode 1 at Issaikyo (Oana and NW of Oana)
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[ 1914 Nov 12 - 1914 Nov 14 ± 1 days ] Uncertain Eruption
| Episode 1 | Eruption | Issaikyo | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1914 Nov 12 - 1914 Nov 14 ± 1 days | Evidence from Unknown | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo
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[ 1896 Sep 5 - 1896 Sep 19 ] Uncertain Eruption
| Episode 1 | Eruption | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1896 Sep 5 - 1896 Sep 19 | Evidence from Unknown | ||||||||||||||||||||||||
|
List of 3 Events for Episode 1
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1895 Mar 8 - 1895 Sep 13 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (near Oana) | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1895 Mar 8 - 1895 Sep 13 | Evidence from Observations: Reported | ||||||||||||||||||||||||||||||||||
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List of 5 Events for Episode 1 at Issaikyo (near Oana)
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1894 Mar 16 - 1894 Apr 12 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (near Oana) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1894 Mar 16 - 1894 Apr 12 | Evidence from Observations: Reported | ||||||||||||||||||||||||
|
List of 3 Events for Episode 1 at Issaikyo (near Oana)
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1893 Nov 9 - 1893 Nov 10 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1893 Nov 9 - 1893 Nov 10 | Evidence from Observations: Reported | |||||||||||||||||||||||||||||
|
List of 4 Events for Episode 1 at Issaikyo
| ||||||||||||||||||||||||||||||
1893 May 19 - 1893 Jul 13 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (west of Oana) | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1893 May 19 - 1893 Jul 13 | Evidence from Observations: Reported | |||||||||||||||||||||||||||||
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List of 4 Events for Episode 1 at Issaikyo (west of Oana)
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[ 1844 ] Uncertain Eruption
| Episode 1 | Eruption | Issaikyo (Oana) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1844 - Unknown | Evidence from Unknown | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo (Oana)
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1800 (?) Confirmed Eruption
| Episode 1 | Eruption | Issaikyo (Oana) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1800 (?) - Unknown | Evidence from Observations: Reported | ||||||||||||||
|
List of 1 Events for Episode 1 at Issaikyo (Oana)
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1711 (?) Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo (Oana area) | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1711 (?) - Unknown | Evidence from Observations: Reported | ||||||||||||||||||||||||
|
List of 3 Events for Episode 1 at Issaikyo (Oana area)
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1331 Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo, Az-OA tephra | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1331 - Unknown | Evidence from Observations: Reported | |||||||||||||||||||||||||||||
|
List of 4 Events for Episode 1 at Issaikyo, Az-OA tephra
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0600 ± 200 years Confirmed Eruption
| Episode 1 | Eruption | Az-JP6 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0600 ± 200 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Az-JP6 tephra
| ||||||||||||||||||||
0150 BCE ± 200 years Confirmed Eruption
| Episode 1 | Eruption | Issaikyo, Az-JP5 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0150 BCE ± 200 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo, Az-JP5 tephra
| ||||||||||||||||||||
0950 BCE ± 100 years Confirmed Eruption
| Episode 1 | Eruption | Issaikyo, Az-JP4 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0950 BCE ± 100 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo, Az-JP4 tephra
| ||||||||||||||||||||
1800 BCE ± 50 years Confirmed Eruption
| Episode 1 | Eruption | Issaikyo, Az-JP3 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1800 BCE ± 50 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo, Az-JP3 tephra
| ||||||||||||||||||||
2750 BCE ± 200 years Confirmed Eruption
| Episode 1 | Eruption | Issaikyo, Az-JP2 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2750 BCE ± 200 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo, Az-JP2 tephra
| ||||||||||||||||||||
3000 BCE ± 50 years Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Issaikyo, Az-IS tephra | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3000 BCE ± 50 years - Unknown | Evidence from Isotopic: 14C (calibrated) | ||||||||||||||||||||||||
|
List of 3 Events for Episode 1 at Issaikyo, Az-IS tephra
| |||||||||||||||||||||||||
4150 BCE ± 500 years Confirmed Eruption VEI: 3
| Episode 1 | Eruption | Azuma Ko-Fuji, Az-KF tephra | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4150 BCE ± 500 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||||||||||||
|
List of 4 Events for Episode 1 at Azuma Ko-Fuji, Az-KF tephra
| ||||||||||||||||||||||||||||||
4550 BCE ± 1000 years Confirmed Eruption
| Episode 1 | Eruption | Issaikyo-Minami, Az-JP1 tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4550 BCE ± 1000 years - Unknown | Evidence from Correlation: Tephrochronology | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Issaikyo-Minami, Az-JP1 tephra
| ||||||||||||||||||||
5400 BCE ± 200 years Confirmed Eruption VEI: 1
| Episode 1 | Eruption | Goshiki-numa, Az-GS tephra | |||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5400 BCE ± 200 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||||||||||||
|
List of 4 Events for Episode 1 at Goshiki-numa, Az-GS tephra
| ||||||||||||||||||||||||||||||
5700 BCE ± 50 years Confirmed Eruption VEI: 2
| Episode 1 | Eruption | Oke-numa, Az-OK tephra | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5700 BCE ± 50 years - Unknown | Evidence from Isotopic: 14C (calibrated) | |||||||||||||||||||
|
List of 2 Events for Episode 1 at Oke-numa, Az-OK tephra
| ||||||||||||||||||||
There is data available for 1 deformation periods. Expand each entry for additional details.
| Start Date: 2011 Mar 11 | Stop Date: 2011 Mar 11 | Direction: Subsidence | Method: InSAR |
| Magnitude: 15.000 cm | Spatial Extent: 15.00 km | Latitude: 38.000 | Longitude: 140.000 |
Remarks: Subsidence of plutonic bodies triggered by Mw 9.0 Tohoku earthquake | |||
 |
Close-up interferograms. Blue squares indicate geothermal power plants. GEONET stations are indicated by numbered circles, with the colour inside indicating the GPS displacements in the LOS direction. From: Takada and Fukushima 2013. |
||
Reference List: Takada and Fukushima 2013; Ozawa and Fujita 2013.
Full References:
Ozawa T, Fujita E, 2013. Local deformations around volcanoes associated with the 2011 off the Pacific coast of Tohoku earthquake. J. Geophys. Res., 118, 390-405. https://doi.org/10.1029/2011JB009129
Takada and Fukushima, 2013. Volcanic subsidence triggered by the 2011 Tohoku earthquake in Japan. Nature Geoscience, 6: 637-641.
There is no Emissions History data available for Azumayama.
Maps are not currently available due to technical issues.
The following 1 samples associated with this volcano can be found in the Smithsonian's NMNH Department of Mineral Sciences collections, and may be availble for research (contact the Rock and Ore Collections Manager). Catalog number links will open a window with more information.
| Catalog Number | Sample Description | Lava Source | Collection Date |
|---|---|---|---|
| NMNH 113861 | Hypersthene Andesite | -- | -- |
| Copernicus Browser | The Copernicus Browser replaced the Sentinel Hub Playground browser in 2023, to provide access to Earth observation archives from the Copernicus Data Space Ecosystem, the main distribution platform for data from the EU Copernicus missions. |
| MIROVA | Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity. |
| MODVOLC Thermal Alerts | Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales. |
|
WOVOdat
Single Volcano View Temporal Evolution of Unrest Side by Side Volcanoes |
WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
GVMID Data on Volcano Monitoring Infrastructure The Global Volcano Monitoring Infrastructure Database GVMID, is aimed at documenting and improving capabilities of volcano monitoring from the ground and space. GVMID should provide a snapshot and baseline view of the techniques and instrumentation that are in place at various volcanoes, which can be use by volcano observatories as reference to setup new monitoring system or improving networks at a specific volcano. These data will allow identification of what monitoring gaps exist, which can be then targeted by remote sensing infrastructure and future instrument deployments. |
| Volcanic Hazard Maps | The IAVCEI Commission on Volcanic Hazards and Risk has a Volcanic Hazard Maps database designed to serve as a resource for hazard mappers (or other interested parties) to explore how common issues in hazard map development have been addressed at different volcanoes, in different countries, for different hazards, and for different intended audiences. In addition to the comprehensive, searchable Volcanic Hazard Maps Database, this website contains information about diversity of volcanic hazard maps, illustrated using examples from the database. This site is for educational purposes related to volcanic hazard maps. Hazard maps found on this website should not be used for emergency purposes. For the most recent, official hazard map for a particular volcano, please seek out the proper institutional authorities on the matter. |
| IRIS seismic stations/networks | Incorporated Research Institutions for Seismology (IRIS) Data Services map showing the location of seismic stations from all available networks (permanent or temporary) within a radius of 0.18° (about 20 km at mid-latitudes) from the given location of Azumayama. Users can customize a variety of filters and options in the left panel. Note that if there are no stations are known the map will default to show the entire world with a "No data matched request" error notice. |
| UNAVCO GPS/GNSS stations | Geodetic Data Services map from UNAVCO showing the location of GPS/GNSS stations from all available networks (permanent or temporary) within a radius of 20 km from the given location of Azumayama. Users can customize the data search based on station or network names, location, and time window. Requires Adobe Flash Player. |
| DECADE Data | The DECADE portal, still in the developmental stage, serves as an example of the proposed interoperability between The Smithsonian Institution's Global Volcanism Program, the Mapping Gas Emissions (MaGa) Database, and the EarthChem Geochemical Portal. The Deep Earth Carbon Degassing (DECADE) initiative seeks to use new and established technologies to determine accurate global fluxes of volcanic CO2 to the atmosphere, but installing CO2 monitoring networks on 20 of the world's 150 most actively degassing volcanoes. The group uses related laboratory-based studies (direct gas sampling and analysis, melt inclusions) to provide new data for direct degassing of deep earth carbon to the atmosphere. |
| Large Eruptions of Azumayama | Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA). |
| EarthChem | EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS). |
The Azuma Kofuji cone with its 300-m-wide crater is one of many volcanic features of the Azumayama complex. This volcano group consists of a cluster of cones and lava domes. Volcanic activity has migrated to the E, with the Higashi-Azuma volcano group being the youngest. This photo was taken from the NW on the flanks of Issaikyoyama, which has been the site of historical eruptions (mostly small phreatic explosions).
