Vulkaan "Kick 'em Jenny" bij Grenada (Caraïbisch gebied) rommelt

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Undersea volcano called Kick 'em Jenny rumbling off Grenada

An active underwater volcano off Grenada's northern coast called Kick 'em Jenny was rumbling Thursday and regional disaster authorities were put on alert, though they said it posed no threat of triggering a destructive tsunami.

Since its discovery in the 1930s, Kick 'em Jenny has erupted beneath the surface of the Caribbean Sea at least 12 times, most recently in 2001. The volcano, which rises 1,300 meters (4,265 feet) above the seafloor on a steep slope of the Lesser Antilles ridge, hasn't caused any known deaths or injuries.

The Seismic Research Center at the University of the West Indies said seismic activity had increased in the volcano, which sits 8 kilometers (5 miles) north of Grenada. Recreational divers have reported seeing some "degassing" on the seafloor off Grenada's west coast as gas-rich magma bubbles.

Center researchers put the alert level at "orange," which means an eruption could take place within 24 hours. An eruption would stir up high waves and heat surrounding waters to boiling temperatures. Scientists say the volcano can also shoot hot rocks up through the water column.
Under the alert, all boats must stay at least 5 kilometers (3 miles) from the volcano. Kick 'em Jenny poses the greatest threat to mariners since the gases it releases can lower the density of water so significantly vessels can lose buoyancy and sink.

Acting Prime Minister Elvin Nimrod said Kick 'em Jenny poses "no significant threat" to Grenada or other coastal communities on nearby islands for now. "There is no need to move people away from coastlines," he told reporters. People were advised to go about their lives normally. But some were jittery as seismic activity ramped up, knocking out Internet service.

"People are just wondering what's next," said Kendel Mark, a resident of the outlying island of Carriacou. In a 1939 eruption, Kick 'em Jenny shot a cloud of ash 270 meters (900 feet) above the sea surface. Its eruptions since then have been weaker.

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"We know we're gonna be affected. We just don't know the scale, but I can tell you, it's not going to be Indian Ocean scale," Lyew-Ayee emphasised.

The impact of any tsunami (giant sea wave) caused by an eruption of Kick 'em Jenny, the underwater volcano located eight kilometres north of Grenada, would in all likelihood be evident in Jamaica, but not cause significant damage, and definitely not anywhere near the scale of the damage caused by the mega 'Boxing Day' tsunami, which hit Indonesia on December 26, 2004.

That assurance has come from Dr Parris Lyew-Ayee, director of the Mona GeoInformatics Institute, in the wake of reports that the seismic unit at the University of the West Indies (UWI), St Augustine campus in Trinidad, has raised the alert level from yellow to orange.

The orange alert means there is an elevated level of seismic activity or other unusual activity, and eruption can occur with less than 24 hour's notice.

Lyew-Ayee, the former head of the Department of Geography and Geology at the UWI, Mona campus, made it clear that while it was important to be alert to the potential fallout, media should guard against sending the public into an unnecessary panic.

"I don't want to cause a panic. A lot of people just freak out about every little thing. There would be no way (that) - the type of tidal energy that was released by the Indonesia or Japanese tsunamis - Kick 'em Jenny can release that type of energy," he insisted.

Kick'em Jenny Volcano with Dr. Steve Carey | Nautilus Live

Sampling at Kick 'em Jenny | Nautilus Live

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Caribbean volcano Kick 'em Jenny: Ships warned off area

Ships sailing in the Caribbean have been told to steer clear of an underwater volcano after it started showing increased seismic activity.

The volcano, called Kick 'em Jenny, is located 8km (5 miles) off Grenada.

The government of Grenada has imposed a 5km exclusion zone around Kick 'em Jenny after the alert was raised to orange, which means an eruption could take place within 24 hours.

Seismologists said there was no imminent danger to the region.

Prof Richard Robertson, of the West Indies Seismic Research Centre (SRC) in Trinidad, said there was no indication that the increased seismic activity would generate a tsunami.

He explained that while an eruption was likely, it would probably not produce enough material to dislodge large amounts of water.

But he warned marine operators to stay outside the exclusion zone, as an increase in gases could reduce the buoyancy of ships.

The volcano is on the shipping route from St Vincent to Grenada.

Kick 'em Jenny, which rises 1.3km above the seafloor on a steep slope of the Lesser Antilles ridge, is one of the most active volcanoes in the eastern Caribbean.

It has erupted at least a dozen times since its first recorded eruption in 1939 but has not caused any reported deaths.

In 1939, a 270m-high ash cloud shot up from the sea's surface when Kick 'em Jenny erupted.

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Kick em Jenny alert status raised to orange
Kick em’ Jenny, one of the most active volcanoes in the Eastern Caribbean.
Barbados'
Kick ‘em Jenny underwater volcano, which is also located near Grenada, is being monitored as a resulted of heightened activity.

The alert level of the volcano has been raised from yellow to orange, but poses no imminent danger to the region, according to the Department of Emergency Management (DEM). Yesterday, Trinidad and Tobago's Office of Disaster Preparedness and Management (ODPM) issued a warning to their citizens following the volcano's alert level being raised.

Kerry Hinds, who is director of the DEM, stressed that there is no indication of immediate danger to Barbados or the region, adding that all official advisories will be issued by her organization and the Barbados Government Information Service.

“We are monitoring the situation, which has been brought to our attention by the Seismic Research Centre (SRC) of the University of the West Indies in Trinidad,” she stated. Hinds urged ships and marine operators to maintain a 5-kilometer radius from the volcano, which is on a shipping route from St. Vincent and the Grenadines to Grenada.

ODPM noted that Trinidad and Tobago is not under any threat at this time. Hinds added that there was no current tsunami threats.

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Increased activity at Kick 'em Jenny volcano
Increased activity at Kick 'em Jenny submarine volcano, 1.5 km (1 mile) exclusion zone to be strictly observed

Kick 'em Jenny submarine volcano is showing signs of increased unrest. The latest activity was observed from June 5 to 12, 2020, with more than 1 300 earthquakes. Although the alert level remains at Yellow (2 of 4), authorities urge marine operators to be vigilant when traversing the area.

The National Disaster Management Agency (NaDMA) of St. Vincent and the Grenadines reminds the public to strictly observe an exclusion zone of 1.5 km (1 mile) from the summit of the volcano, located 8 km (5 miles) north of Grenada at about 200 m (650 feet) beneath the surface of the sea.

Increased seismic activity at this volcano results in the emission of gases and reduced density of the water around the summit, but there is currently no tsunami threat for St. Vincent and the Grenadines or the region, the National Emergency Management Organization (NEMO) said.

From June 5 through 12, the University of West Indies - Seismic Research Center (UWI SRC) recorded 1 384 low magnitude volcanic earthquakes, with the strongest being M1.8.

High-level volcanic earthquakes persisted for about 78 hours, then abruptly subsided and decayed to background levels.

Activities have since reduced, but there is continuous monitoring of the volcano which remains at the Yellow Level Alert -- the volcano is restless: seismicity and/or fumarolic activity are above the historical level or other unusual activity has been observed or can be expected without warning.

Kick ‘em Jenny is the only live submarine volcano in the Eastern Caribbean and the most active volcano in the region.

It erupted at least 14 times since it was discovered in 1939, most recently on April 29, 2017.

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Seismic activity at Kick ’em Jenny submarine volcano, Grenada

The University of the West Indies Seismic Research Center (UWI SRC) has reported a return to normal seismic activity levels at the Kick ’em Jenny submarine volcano in Grenada as of early February 11, 2024, following increased activity since February 9. The National Disaster Management Agency (NaDMA) Grenada maintains a Yellow alert level, advising continued adherence to the 1.5 km (0.9 miles) marine exclusion zone.

On Monday, February 12, 2024, the National Disaster Management Agency (NaDMA) of Grenada issued a statement regarding the seismic activity at the Kick ’em Jenny submarine volcano. According to the University of the West Indies Seismic Research Center (UWI SRC), there was a notable increase in seismic activity starting at 23:14 LT on Friday, February 9, 2024. This heightened activity prompted concerns of potential escalation.

However, by 03:00 LT on Sunday, February 11, the situation had significantly improved, with the seismic activity decreasing in both magnitude and frequency, eventually returning to what is considered normal levels.

The count of events up to that time was 3 400, with the largest measuring M3.3 on February 10.

Despite this positive development, the UWI SRC has cautioned that the volcano’s activity may still fluctuate, potentially increasing, decreasing, or stabilizing at current readings.

The volcano is being continuously monitored by four fully functional seismic stations located in the north of Grenada.

INaDMA Grenada has decided to maintain the alert level for Kick ’em-Jenny at Yellow. This level of alert signifies a phase where there is a need for preparedness for a range of activity levels. It also mandates that all marine interests adhere to the established exclusion zone of 1.5 km (0.9 miles) around the volcano to ensure safety and minimize the risk of any potential hazards that could arise from sudden changes in volcanic activity.

Kick ’em Jenny, located 8 km (5 miles) off the northern shore of Grenada, is an active submarine volcano that rises 1 300 m (approximately 4 265 feet) from the sea floor.

Investigations have uncovered a significant arcuate collapse structure responsible for a submarine debris avalanche extending more than 15 km (about 9.3 miles) westward. Additionally, bathymetric surveys identified a nearby submarine cone, Kick ’em Jack, and several submarine lava domes to the south, suggesting these features, along with subaerial tuff rings and lava flows on Ile de Caille and neighboring islands, might form part of a large volcanic complex.

Documented eruptions have occurred frequently since 1939, mainly identified through acoustic signals. The 1939 eruption, which sent a cloud 275 m (around 902 feet) above the sea, visible to many in northern Grenada, was the first recorded activity. Eruptions have ranged from explosive to the quiet extrusion of lava flows and domes, with deep rumbling noises sometimes heard onshore. Recent activities have also altered the summit crater’s shape.

The last eruptive episode at this volcano took place on March 29, 2017 (VEI 0).