نشاط بركان لشهر أبريل 29 ، 2013 - مستوى تنبيه الطيران في الجزيرة البيضاء (نيوزيلندا) يعود إلى "أخضر" (من الأصفر)

هذا آخر (تقريبا) يوميا وتعتزم متابعة التغييرات نشاط البراكين في جميع أنحاء العالم.
وهذا الموضوع كتب بواسطة جيولوجي رودجر ويلسون الذي يتخصص في الزلزالية بركان وVervaeck أرمان. لا تتردد في إخبارنا عن نشاط جديد أو تغيير إذا لم نكتب عن ذلك. -

29 أبريل، 2013 النشاط البركان

ذكرت KVERT أي تغييرات كبيرة في سلوك ثورة البركان / الزلزالية في خمسة بالموقع Kamchatkan البراكين: Tolbachik (basaltic fissure eruption - high seismicity), Sheveluch and Kizimen (lava flow/dome extrusion - moderate seismicity), Bezymianny (lava flow/dome extrusion - weak seismicity), and Karymsky (occasional strombolian/vulcanian explosions - no seismic data due to monitoring equipment outtages). Moderate seismicity also affects Gorely volcano which exhibits a high level of hydrothermal unrest.

Tolbachik_MODIS_Hotspots_20130429

A short-lived burst of seismicity occurred at Iliamna volcano (Alaska Range) (station INE) overnight, including a magnitude M2.0 earthquake.

Small earthquakes were also recorded at جبل هود و نيوبيري volcano (Cascade Range) (OR).

Low-level seismicity (both shallow and deep) also continues at/near ماموث ماونتن بركان و طويل وادي كالديرا (CA) (station MRD) this morning.

Still no updated seismic data from كوليما volcano (Mexico), but this morning's Colima volcanocam photo shows a pyroclastic flow descending the flank of the Fuego cone. Activity has been high at البركان volcano the past two days. Exhalations of gas and some ash (occasioanllly punctuated by larger blasts of lava blocks and ash) now occur at an average rate of nearly three events per hour. The Popo seismogram shows a period of spasmodic tremor, exhalation signals and small volcano-tectonic earthquakes affecting the volcano today.

popoTlamacas20130429

Numerous low-frequency "chugging" earthquakes affect بكايا volcano (Guatemala) (station PCG) today. Periods of volcanic tremor and occasional small strombolian explosions characterize activity at فويغو volcano (station FG3), and relatively low external activity affects the Santiaguito Dome Complex (سانتا ماريا volcano) (station STG3), though tremor has recently increased at the volcano.

Fuego_20130429

Santiaguito_20130429

Volcano-seismicity has recently returned to (or at least, approaches!) background level at Nicaraguan volcanoes: سان كريستوبال (station CRIN), Telica (station TELN), and ماسايا (station MASN) during the past few days.

تستمر الزلازل البركانية لتكون متكررة في سان ميغيل volcano (El Salvador) (station VSM) this morning.

Small earthquakes (likely associated with heating of the crater lake there) continue at POAS بركان (كوستاريكا) (محطة POA2).

Following a brief hiatus over the weekend, seismic unrest has once again increased at نيفادو ديل رويز بركان (كولومبيا) (محطة OLLZ).

Strong explosions signals punctuate the seismic record this morning at التبخير volcano (Ecuador) (station RETU). Inclement weather prevents viewing the activity, but the clouds did briefly part last night, affording some picturesque photos of the volcano both at rest and in eruption. Small earthquakes continue in varying daily numbers at كوتوباكسي volcano (station CO1V). The daytime seismogram (seismic monitoring at the volcano is affected by a weak battery and is only functional during daylight hours when power is supplied by solar panels) at Reventador volcano shows strong (co-eruptive?) seismicity occurring at the volcano today. A recent Reventador volcanocam photo shows only a white gas plume (SO2) over the cone, suggesting the activity is primarily effusive.

Tungurahua_20130428f

GNS has reduced the aviation alert level at أبيض جزيرة volcano (New Zealand) from "yellow" to "green", indicating that the volcano has returned to a relatively quiescent state. Today's White Island seismogram shows relatively low-level (but continuous) volcanic tremor and some tiny local earthquakes. An observation flight over the island this past weekend revealed that the previous two crater lakes have merged, "drowning" the recently active vent.

White_Island_201304

الأخيرة MODIS satellite thermal imagery depicts volcanogenic "hotspots" at Tolbachik volcano.

التعليقات

  1. رولان SEMEESE يقول:

    Andrew, yes it isn't dangerous . Im convinced that those experienced kayakers will not fall into the sea.
    The only point of attention is that the sea water will heaten up in the vicinity of the lava streams entering the water. I myself saw by a similar lava entrance in the sea at Piton de la Fournaise (Island La Reunion) that some people stood with their feet in the sea watching the beautiful spectacle. Some of them were burnt 2nd degree bij the too hot watertemperature.

  2. أندرو Sillis يقول:

    Wondered if you'd seen these photos of Kayakers at the end of a lava stream on the BBCs children's news website...

    http://www.bbc.co.uk/newsround/22339953

    • أرماند Vervaeck يقول:

      Thanks Andrew; I know the spot and it is not dangerous as the molte, lave comes into the sea on a controlled way, but i agree it looks weird 🙂

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