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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Bathymetry of Kick'em Jenny - Doc. NOAA / Research Vessel Ronald H. Brown / March 2002 / GVP

Bathymetry of Kick'em Jenny - Doc. NOAA / Research Vessel Ronald H. Brown / March 2002 / GVP

The seismic research center of the University of the West Indies / Caribbean notified the authorities that after an increase of seismicity since July, with over 200 micro and small earthquakes of magnitude less than 3, and its continuation up today, a continuous and strong signal from 1:25 to 3:00 marked the submarine volcano Kick 'em Jenny.  The alert level rose to orange / level 3 this July 23, 2015.
This level, which is unique to this submarine volcano, indicating that an eruption is likely to begin within a period of less than 24 hours.

In addition, the degassing was observed at "Moliniere Sculpture Park area," a renowned diving site off the west coast of Granada.

The alert relates to both the so-called vulnerable communities and the marine traffic:
All traffic is prohibited in a 1.5 km zone around the volcano - 1 ° exclusion zone - and non-essential traffic, including boating, is asked to stand at more than 5 km from the top - 2 ° area exclusion.

Left: Seabeam image of Kick'em Jenny and her neighbors - observation by R.H.Brown ship in 2003 - right,  Kick'em Jenny location in relation to the Grenadines - Doc. Oregonstate Univ. - a click to enlarge.Left: Seabeam image of Kick'em Jenny and her neighbors - observation by R.H.Brown ship in 2003 - right,  Kick'em Jenny location in relation to the Grenadines - Doc. Oregonstate Univ. - a click to enlarge.

Left: Seabeam image of Kick'em Jenny and her neighbors - observation by R.H.Brown ship in 2003 - right, Kick'em Jenny location in relation to the Grenadines - Doc. Oregonstate Univ. - a click to enlarge.

The Kick'em Jenny is part of a group of four submarine volcanoes located 9 km from the northern coast of the island of Grenada. This volcano was discovered in 1939, following numerous earthquakes and tsunamis that affected Grenada and the Grenadines, and even reached Barbados, the island the most to the eastern Caribbean.

An explosive eruption produced an ash plume of more than 300 meters above the sea level; since then, at least twelve eruptions were counted, some causing surface disturbances and small tsunamis. The last eruption, dated of 2001, was preceded by strong earthquakes. The volcano was explored by the teams of the Nautilus Exploration Program in November 2013.

On the left, localization of Granada and Kick'em Jenny in the arc of the Caribbean, and volcano monitoring means - Doc. University of the West Indies / a click to enlarge - right, schematic illustration of the danger presented by the Kick'em Jenny.On the left, localization of Granada and Kick'em Jenny in the arc of the Caribbean, and volcano monitoring means - Doc. University of the West Indies / a click to enlarge - right, schematic illustration of the danger presented by the Kick'em Jenny.

On the left, localization of Granada and Kick'em Jenny in the arc of the Caribbean, and volcano monitoring means - Doc. University of the West Indies / a click to enlarge - right, schematic illustration of the danger presented by the Kick'em Jenny.

The area is to be avoided, even between eruptions: the release of large amounts of gas bubbles from the volcano, with no signs of this surface activity, can reduce sea water density above the vent, and decrease the lift of the water.

In August 1944, the Island Queen, a wooden schooner disappeared between Grenada and St. Vincent islands, without leaving any debris.

 

Sources :

- Nation news Barbado’s news leader : Increased seismic activity at Kick 'em Jenny - link

- The University of the West Indies - news - link

- Global Volcanism Program – Kick’em Jenny 

- Nautilus Live – 2013 Exploration program – link

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