البراكين النشطة في العالم من 31 / 08 / 2011 ل06 / 09 / 2011 + 2 الفيديو

تقرير النشاط البركاني الأسبوعي هو مشروع تعاوني بين Smithsonian's Global Volcanism Program و ال US Geological Survey's Volcano Hazards Program.
تحديث كل اسبوع (mostly Wednesday), notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity of volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.

نشاط جديد أو اضطراب أو تغيير نشاط

كليفلاند Chuginadak الجزيرة - satellite map – summit elev. 1730 m
On 30 August, AVO reported that satellite observations during the previous two weeks indicated that lava-dome growth at Cleveland had paused. AVO lowered the Volcano Alert Level to Advisory and the Aviation Color Code to Yellow. During 31 August-2 September cloud cover prevented views of the summit crater, but a thermal anomaly at the summit was observed during 3-5 September. Observations on 6 September indicated that the lava dome had resumed growth, reaching 120 m in diameter and filling the floor of the crater. AVO raised the Volcano Alert Level to Watch and the Aviation Color Code to Orange. No current seismic information was available because Cleveland does not have a real-time seismic network.
معلومات بركان: تقع Stratovolcano متماثل جبل كليفلاند في الطرف الغربي من جزيرة Chuginadak غير مأهولة على شكل دمبل في شرق وسط Aleutians. تعد ستراتوفولكان 1,730-m-high هي أعلى مجموعة من جزر Islands Four وهي واحدة من أكثر المجموعات نشاطًا في Aleutians. العديد من تدفقات الحمم البركانية الكبيرة تنحدر من جوانبها. من الممكن أن تُنسب إلى كليفلاند بعض الانفجارات من 18th إلى 19th المنسوبة إلى Carlisle (بركان يقع عبر مضيق كارلايل باس إلى الشمال الغربي). في 1944 أنتجت كليفلاند الوفاة الوحيدة المعروفة من ثوران أليوتيان. الانفجارات الأخيرة من جبل. اتسمت كليفلاند بانبعاثات رماد متفجرة لم تدم طويلاً ، في بعض الأحيان مصحوبة بتدفقات الحمم البركانية وتدفق الحمم البركانية إلى أسفل الجناحين.

KILAUEA هاواي (الولايات المتحدة الأمريكية) - satellite map – summit elev. 1222 m
During 31 August-6 September, HVO reported that the level of the lava-lake surface in the deep pit within Kilauea's Halema'uma'u crater periodically fluctuated but remained mostly stable below the inner ledge 75 m below the crater floor. Periodic measurements indicated that the gas plume from the vent continued to deposit variable amounts of ash and occasionally fresh spatter nearby. At Pu'u 'O'o' crater, lava from sources on the E portion of the crater floor fed a perched lava lake. Lava from a source at the W edge of the crater floor spread N and S along the base of the W crater wall and up to the base of the W, inactive wall of the perched pond. During 2-3 September a new perched pond fed from the W-edge source had formed.
معلومات بركان: Kilauea, one of five coalescing volcanoes that comprise the island of Hawaii, is one of the world’s most active volcanoes. Eruptions at Kilauea originate primarily from the summit caldera or along one of the lengthy E and SW rift zones that extend from the caldera to the sea. About 90% of the surface of Kilauea is formed of lava flows less than about 1,100 years old; 70% of the volcano’s surface is younger than 600 years. A long-term eruption from the East rift zone that began in 1983 has produced lava flows covering more than 100 sq km, destroying nearly 200 houses and adding new coastline to the island.

KIZIMEN Eastern Kamchatka (Russia) 55.130 درجة شمالا، 160.32 ° E. قمة القمة. 2376 م
KVERT reported that during 26 August-1 September the number and magnitude of volcanic earthquakes at Kizimen continued to increase; about 1,000 earthquakes were detected daily. Satellite images showed a large bright thermal anomaly on the volcano all week and gas-and-steam plumes that drifted 60 km E on 26 and 29 August. Lava on the E flank continued to flow. In addition to strong fumarolic activity, video images from the previous week showed a new long fissure at the top of the volcano. وظل رمز لون الطيران في أورانج.
معلومات بركان: إن Kizimen عبارة عن ستراتوفولكان مخروطي معزول يشبه شكليا جبل Mount Helens قبل ثوران 1980. تتكون قمة Kizimen من قباب الحمم البركانية المتداخلة ، وتدفقات الحمم البركانية العاتية تنحدر من جوانب البركان ، وهو أقصى غرب سلسلة بركانية شمال بركان كرونوتسكي. تم تشكيل Kizimen عالية 2,376-m خلال أربع دورات ثورة البركان التي بدأت منذ حوالي 12,000 سنوات و 2,000-3,500 دائمة. حدثت أكبر الانفجارات منذ سنوات 10,000 و 8300-8400 ، وحدثت ثلاث فترات من نمو قبة الحمم البركانية على المدى الطويل. بدأت أحدث دورة انفجارية منذ حوالي 3,000 مع انفجار كبير وتلاه نمو قبة الحمم البركانية على فترات متقطعة حول سنوات 1,000. ثوران انفجار منذ حوالي عام 1,100 أنتج انفجار جانبي وخلق حفرة 1.0 × 0.7 واسعة عرضت اختراقها إلى NE ، التي داخلها نمت قبة الحمم البركانية الصغيرة (الرابعة في Kizimen). ثوران انفجاري واحد ، خلال 1927-28 ، تم تسجيله في التاريخ التاريخي.

LEWOTOBI Flores Island (Indonesia) 8.542°S, 122.775°E. قمة القمة. 1703 م
CVGHM reported that during 26-31 August seismicity at Lewotobi increased. Plumes of "smoke" rose 15-50 m above the Lewotobi Perampuan crater rim; no other significant changes were visibly apparent. Based on the seismic data, the Alert Level was raised to 2 (on a scale of 1-4) on 31 August. Visitors and residents were advised not to approach the volcano within 1 km of the Lewotobi Perampuan crater.
معلومات بركان: The Lewotobi "husband and wife" twin volcano (also known as Lewetobi) in eastern Flores Island is composed of the Lewotobi Lakilaki and Lewotobi Perempuan stratovolcanoes. Their summits are less than 2 km apart along a NW-SE line. The conical 1,584-m-high Lewotobi Lakilaki has been frequently active during the 19th and 20th centuries, while the taller and broader 1,703-m-high Lewotobi Perempuan has erupted only twice in historical time. Small lava domes have grown during the 20th century in the crescentic summit craters of both volcanoes, which are open to the N. A prominent flank cone, Iliwokar, occurs on the E flank of Lewotobi Perampuan.

POPOCATEPETL México 19.023°N, 98.622°W; summit elev. 5426 m
CENAPRED reported that on 29 August instances of emissions of gas, steam, and some ash from Popocatépetl increased. The next day an ash plume rose 1 km above the crater and drifted WNW, producing ashfall in San Pedro Nexapa (14 km NW) and Amecameca (19 km NW). CENAPRED noted that recent rain in the area may have contributed to the recent increase in activity. During 30-31 August there were 111 plumes of gas, steam, and some ash detected by the network, in addition to periods of harmonic tremor. Signals from detectors near drainages possibly indicated lahars. During 1-4 September the monitoring network registered 4-12 instances daily of emissions of gas, steam, and some ash. Periods of tremor continued to be detected.
معلومات بركان: Popocatépetl, whose name is the Aztec word for smoking mountain, towers to 5,426 m 70 km SE of Mexico City and is North America's second-highest volcano. Frequent historical eruptions have been recorded since the beginning of the Spanish colonial era. A small eruption on 21 December 1994 ended five decades of quiescence. Since 1996 small lava domes have incrementally been constructed within the summit crater and destroyed by explosive eruptions. Intermittent small-to-moderate gas-and-ash eruptions have continued, occasionally producing ashfall in neighboring towns and villages.

Time lapse video from the latest activity

POAS Costa Rica 10.20 درجة شمالا، 84.233 ° W. قمة القمة. 2708 م
On 31 August OVSICORI-UNA reported that since mid-July incandescence was visible during the day on the lava dome of Poás, which had not occurred since 1981, and was the result of changes in activity that had started several months before. OVSICORI-UNA speculated that the changes could be either from recent magma intrusion أو change in the hydrothermal plumbing system and noted the need to further analyze data from seismic, deformation, geochemical, and field measurements.
معلومات بركان: The broad, well-vegetated edifice of Poás, one of the most active volcanoes of Costa Rica, contains three craters along a N-S line. The frequently visited multi-hued summit crater lakes of the basaltic-to-dacitic volcano, which is one of Costa Rica’s most prominent natural landmarks, are easily accessible by vehicle from the nearby capital city of San José. A N-S-trending fissure cutting the 2,708-m-high complex stratovolcano extends to the lower northern flank, where it has produced the Congo stratovolcano and several lake-filled maars. The southernmost of the two summit crater lakes, Botos, is cold and clear and last erupted about 7,500 years ago. The more prominent geothermally heated northern lake, Laguna Caliente, is one of the world’s most acidic natural lakes, with a pH of near zero. It has been the site of frequent phreatic and phreatomagmatic eruptions since the first historical eruption was reported in 1828. Poás eruptions often include geyser-like ejection of crater-lake water.

Paos volcano activity from February until August 2011 - Images Ovsicori-una
Please jave patience - loading the video can take a couple of minutes (server Ovsicori)

إيتنا صقلية (إيطاليا) - Satellite map – summit elev. 3330 m
أيضا قراءة : جديدة اندلاع جبل إتنا، صقلية، إيطاليا (08 / 09 / 2011)

For more information of the volcanoes with نشاط مستمرالرجاء click here

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التعليقات

  1. سارة في شيكاغو يقول:

    I think that if it doesn't interrupt air traffic (inconvenienceing thousands of travelers), or if it doesn't wipe out , or threaten to wipe out, whole villages, it isn't a news story that requires the attention of the media.