強度3地震隨著'隆隆聲'在菲律賓塔爾火山邊感覺到

Philippines volcano on verge of eruption
菲律賓火山在噴發的邊緣
2011-04-18

強度3地震隨著'隆隆聲'在塔爾火山邊感覺到
Intensity 3 quake 'with rumbling sounds' felt near Taal Volcano
By Angelo L. Gutierrez (philstar.com)
Updated April 20, 2011 09:06 AM
Translation by Autumnson Blog

MANILA, Philippines - Intensity 3 and Intensity 1 volcanic earthquakes were felt in two villages near Taal Volcano yesterday, the Philippine Institute of Volcanology and Seismology (Phivolcs) reported.
菲律賓馬尼拉 - 強度3和強度1的火山地震昨天在塔爾火山附近的兩條村莊感到，菲律賓火山學和地震學研究所（Phivolcs）報告。
Phivolcs said in its April 20 bulletin that a total of 13 volcanic earthquakes were detected in Taal Volcano during the past 24 hours.
Phivolcs在其4月20日公告表示，在過去24小時在塔爾火山共發現13次火山地震。
One of the quakes, which occured at 3:15 p.m. Tuesday, was felt at Intensity 3 in Barnagay Calauit and Intensity 1 in Barangay Pira-Piraso.

Phivolcs said that the tremor was accompanied by rumbling sounds.

In the Phivolcs Earthquake Intensity Scale, Intensity 3 is classified as "weak", but it is felt by many people indoors specially in upper floors of buildings.

In events of an Intensity 3 tremor, Phivolcs said, "Vibration is felt like the passing of a light truck. Dizziness and nausea are experienced by some people."

Meanwhile, Phivolcs said that field observation and measurements conducted at the eastern sector inside the main crater lake yestery showed that the temperature increased from 30.5°C to 31.5°C.

Alert Level 2 remains hoisted over the volcano, meaning "magma has been intruding towards the surface."

Phivolcs said the main crater, the Daang Kastila trail and Mt. Tabaro are strictly off-limits, because sudden steam-driven explosion may take place in these areas, adding that "high concentration of toxic gases may accumulate."

"Breathing air with high concentration of gases can be lethal to human, animals and even cause damage to vegetation," Phivolcs warned.

http://www.philstar.com/Article.aspx?articleId=678359&publicationSubCategoryId=200

菲塔爾火山爆發跡象警戒級別升
(星島)2011年4月9日 星期六 15:53
菲律賓 塔爾火山連日來蠢蠢欲動，該國的火山和地震研究所今日表示，塔爾火山有爆發跡象，把警戒級別提升至2級，促請公眾遠離危險區域。

聞名遐邇的塔爾火山是地球上最低最小的火山，最高處海拔僅300多米，位於菲律賓呂宋島南部的八打雁省，距離首都馬尼拉 僅50多公里。塔爾火山最近一次大噴生在1977年，當時馬尼拉上空一度烏云遮日，灰煙四起。

研究所指出，監測顯示塔爾火山地震活動仍在加劇，監測到的地震次數上升，地震震源深度變淺。過去24小時，已經監測到塔爾火山發生至少21次地震活動。塔爾火山口湖每天釋放的二氧化碳量已從今年2月時的1875噸攀升至3月底的4670噸，大量增加的二氧化碳是由地下巖漿活動釋放。
http://hk.news.yahoo.com/article/110409/3/npm5.html

厄瓜多爾頓古拉瓦火山意外噴發；厄瓜多爾和伊朗簽署重要合作協定