Bulusan Vulkan genaue Angaben
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Bulusan Vulkan genaue Angaben

Der Bulusan Vulkan aktiver Vulkan der Philippinen

genaue Daten und Fakten zum Bulusan Vulkan

bulusan.jpg

Lage:
Sorsogon Province,

70 km Sued Oestlich des Mayon Vulkan,

etwa 250 km suedlich von Manila (12°46.2′N, 124°03′E) gelegen,

zaehlt dieser zu einem der aktivsten Vulkane, auf den Philippinen.
Kleinere Eruptionen und staendige Erdbeben lassen einen nahen Ausbruch befuerchten.

( Stand Mai 2007 Wahrnung Level 2 )

Bulusan Daten:

Hoehe: 1.559 km
Durchmesser: 15 km
Type Vulkan: Stratovulkan inliegender Caldera
Heisse Quellen: San Benon Springs, Mapaso Springs, San Vicente Springs, Masacrot Springs

Beschaffenheit:

Geologische Daten:

Tektonische Daten: Bicol Volcanic Chain

Eruption Type:

1. Phreatic (e.g. 1918-1922, 1980)
2. Strombolian (e.g. 1918-1919)
3. Caldera-forming (e.g. 40,000 YBP)

Aktivitaeten:

Eruptions Ankuendigung:

1. Erdbeben und dumpfes rumpeln.
2. Dampfausstoss.
3. Vegatation verduerrt um den Vulkan herum.
4. starke Temperaturschwankungen bei Heissen Quellen von San Benon.
5. Starkes grummeln.
6. Ausstoss gelber Gase, Schwefelgase in grossen Mengen.

Ausbruch:

Gefahrenzonen:

bulusan_pf-hazards_small.jpgbulusan_lhrlv-hazards-_small.jpg
Gefahren - Zonen Karten

Beobachtungs Zentren:

Volcano Observatory: Bulusan Volcano Observatory, Cabid-an, Sorsogon City

Methoden:

1. Seismic
2. Ground deformation – precise leveling, electronic distance measurement (EDM), tilt
3. Hotspring temperature and flow rate measurements
5. Visual observations – steaming activity and other visually observed phenomena

Monitoring Stations:

A - Seismic Network

bvo_cabidan_small_01.jpg bvo_instru_set_up_small_02.jpg
Bilder einer Ueberwachungsstation

· Bulusan Volcano Observatory, Sorsogon City (VBN)
· Upper Inlagadian Hill Seismic Station (VBIH)
· Upper Mayong Payong Hill Seismic Station (VBMH)
· Mt. Jormajan Repeater Site (VBRJJ)
· Upper San Roque Seismic Station (VBSR)
· Salvacion Slope Repeater Site (VBSS)

B - Ground Deformation Network

bvmonitoring-network2006_small.jpg
Stationen Karte

· EDM : Survey lines at Salvacion-Hinde and Aniog-Lower Slope
· PRECISE LEVELING: Survey line at Mapaso

Wichtige Hinweise und Gefahrenlevel fuer den Bulusan Vulkan !

Alert Level

Criteria

Interpretation

No Alert

Background, quiet No eruption in foreseeable future

1

Low level seismic, fumarolic, other unrest Magmatic, tectonic, or hydrothermal disturbance; no eruption imminent

2

Moderate level of seismic, other unrest with positive evidence for involvement of magma Probable magma intrusion; could eventually lead to an eruption

3

Relatively high and increasing unrest, including numerous low frequency volcanic earthquakes, accelerating ground deformation, increasing fumarolic activity. Increasing likelihood of an eruption, possibly explosive, probably within days to weeks.

4

Intense unrest, including harmonic tremor and/or many “long-period” (i.e., low frequency) earthquakes and/or dome growth and/or small explosions Magma close to or at the earth’s surface. Hazardous explosive eruption likely, possibly within hours or days.

5

Hazardous eruption in progress. Hazards in valleys and downwind.

Quelle der Angaben und Grafiken: Phil Vulcano Center

Posted by Klaus Wilke on Mai 24, 2007 in News & Berichte, Sorsogon

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