scholarly journals SNhunt151: an explosive event inside a dense cocoon

2018 ◽  
Vol 475 (2) ◽  
pp. 2614-2631 ◽  
Author(s):  
N Elias-Rosa ◽  
S Benetti ◽  
E Cappellaro ◽  
A Pastorello ◽  
G Terreran ◽  
...  
Keyword(s):  
Explosive Event

The Averno 2 fissure eruption: a recent small-size explosive event at the Campi Flegrei Caldera (Italy)

2010 ◽  
Vol 73 (3) ◽  
pp. 295-320 ◽  
Author(s):  
Mauro Antonio Di Vito ◽  
Ilenia Arienzo ◽  
Giuseppe Braia ◽  
Lucia Civetta ◽  
Massimo D’Antonio ◽  
...  
Keyword(s):  
Fissure Eruption ◽  
Campi Flegrei ◽  
Campi Flegrei Caldera ◽  
Explosive Event

Further evidence for an explosive event in the peculiar galaxy NGC 1569

1974 ◽  
Vol 194 ◽  
pp. L119 ◽  
Author(s):  
G. de Vaucouleurs ◽  
A. de Vaucouleurs ◽  
W. Pence
Keyword(s):  
Peculiar Galaxy ◽  
Explosive Event ◽  
Ngc 1569

Location of Stromboli volcano July 2019 paroxysm event based on long-range infrasound detections in several IMS stations

2020 ◽  
Author(s):  
Sandro Matos ◽  
Nicolau Wallenstein ◽  
Emanuele Marchetti ◽  
Maurizio Ripepe
Keyword(s):  
Long Range ◽  
North Atlantic ◽  
Ground Truth ◽  
Explosive Activity ◽  
Stromboli Volcano ◽  
The North ◽  
Lava Fountains ◽  
Event Based ◽  
Estimated Error ◽  
Explosive Event

<p>Stromboli is one of the most active volcanoes on Earth with a continuous explosive activity and persistent degassing since at least 3-7 AD (Rossi et al., 2000). Being an open conduit volcano, its spectacular basaltic explosions interspersed by lava fountains occurring every ≈10 minutes (Ripepe et al., 2002) make it probably the world's best-know and best-monitored volcano.</p><p>On 3<sup>rd </sup>July 2019 at the 14:45:43 UTC a paroxysmal explosion occurred with an ash column that rose almost 5 km above the volcano. This very strong explosive event was detected in several IMS infrasound stations, including IS42, located in the Azores islands in the middle of the North-Atlantic, at a distance of about 3,700 km.</p><p>We present the long-range infrasound detections that allowed us to locate the source based only in infrasound with an estimated error of less than 55 km from the ground truth event.</p><p><strong>Keywords:</strong> Stromboli volcano, paroxysm, infrasound, IMS, IS42</p>

Is Efate (Vanuatu, SW Pacific) a result of subaerial or submarine eruption? An alternative model for the 1 Ma Efate Pumice Formation

2010 ◽  
Vol 2 (3) ◽  
Author(s):  
Robert Stewart ◽  
Karoly Németh ◽  
Shane Cronin
Keyword(s):  
Fault Scarp ◽  
Pyroclastic Rock ◽  
Shallow Marine ◽  
The North ◽  
Sw Pacific ◽  
Volcanic Succession ◽  
Volcaniclastic Deposits ◽  
Caldera Subsidence ◽  
Volcaniclastic Succession ◽  
Explosive Event

AbstractThe Efate Pumice Formation (EPF) is a trachydacitic volcaniclastic succession widespread in the central part of Efate Island and also present on Hat and Lelepa islands to the north. The volcanic succession has been inferred to result from a major, entirely subaqueous explosive event north of Efate Island. The accumulated pumice-rich units were previously interpreted to be subaqueous pyroclastic density current deposits on the basis of their bedding, componentry and stratigraphic characteristics. Here we suggest an alternative eruptive scenario for this widespread succession. The major part of the EPF is distributed in central Efate, where pumiceous pyroclastic rock units several hundred meters thick are found within fault scarp cliffs elevated about 800 m above sea level. The basal 200 m of the pumiceous succession is composed of massive to weakly bedded pumiceous lapilli units, each 2-3 m thick. This succession is interbedded with wavy, undulatory and dune bedded pumiceous ash and fine lapilli units with characteristics of co-ignimbrite surges and ground surges. The presence of the surge beds implies that the intervening units comprise a subaerial ignimbrite-dominated succession. There are no sedimentary indicators in the basal units examined that are consistent with water-supported transportation and/or deposition. The subaerial ignimbrite sequence of the EPF is overlain by a shallow marine volcaniclastic Rentanbau Tuffs. The EPF is topped by reef limestone, which presumably preserved the underlying EPF from erosion. We here propose that the EPF was formed by a combination of initial subaerial ignimbrite-forming eruptions, followed by caldera subsidence. The upper volcaniclastic successions in our model represent intra-caldera pumiceous volcaniclastic deposits accumulated in a shallow marine environment in the resultant caldera. The present day elevated position of the succession is a result of a combination of possible caldera resurgence and ongoing arc-related uplift in the region.

scholarly journals Planetary nebulae with UVIT

2018 ◽  
Vol 620 ◽  
pp. A138 ◽  
Author(s):  
N. Kameswara Rao ◽  
O. De Marco ◽  
S. Krishna ◽  
J. Murthy ◽  
A. Ray ◽  
...  
Keyword(s):  
Ultra Violet ◽  
Position Angle ◽  
Central Source ◽  
The North ◽  
Evolutionary Phase ◽  
The Difference ◽  
Dark Lane ◽  
Far Ultraviolet ◽  
Bright Emission ◽  
Explosive Event

The high excitation planetary nebula, NGC 6302, has been imaged in two far-ultraviolet (FUV) filters, F169M (Sapphire; λeff: 1608 Å) and F172M (Silica; λeff: 1717 Å) and two near-UV (NUV) filters, N219M (B15; λeff: 2196 Å) and N279N (N2; λeff: 2792 Å) with the Ultra Violet Imaging Telescope (UVIT). The FUV F169M image shows faint emission lobes that extend to about 5 arcmin on either side of the central source. Faint orthogonal collimated jet-like structures are present on either side of the FUV lobes through the central source. These structures are not present in the two NUV filters or in the FUV F172M filter. Optical and infrared (IR) images of NGC 6302 show bright emission bipolar lobes in the east-west direction with a massive torus of molecular gas and dust seen as a dark lane in the north-south direction. The FUV lobes are much more extended and oriented at a position angle of 113°. They and the jet-like structures might be remnants of an earlier evolutionary phase, prior to the dramatic explosive event that triggered the Hubble type bipolar flows approximately 2200 years ago. The source of the FUV lobe and jet emission is not known, but is likely due to fluorescent emission from H2 molecules. The cause of the difference in orientation of optical and FUV lobes is not clear and, we speculate, could be related to two binary interactions.

Surface Damage During Kev Ion Irradiation: Results of Computer Simulations

1995 ◽  
Vol 388 ◽  
Author(s):  
R.S. Averback ◽  
Mai Ghaly ◽  
Huilong Zhu
Keyword(s):  
Energy Deposition ◽  
Ion Irradiation ◽  
Surface Damage ◽  
Md Simulations ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Individual Ion ◽  
Atomic Mixing ◽  
Damage Processes ◽  
Explosive Event

AbstractMD simulations have been employed to investigate damage processes near surfaces during keV bombardment of metal targets. For self-ion implantation of au, Cu, and Pt in the range of 5-20 keV, we have found that the proximity of the surface leads to significantly more damage and atomic mixing in comparison to recoil events occurring in the crystal interior. IN some cases, large craters are formed in a micro-explosive event, while in others a convective flow of atoms to the surface creates adatoms and leaves dislocations behind. Both the amount damage created in the surface and its morphology depend sensitively on the details of the energy deposition along individual ion trajectories. the results of these simulations will be summarized and compared to recent scanning tunneling microscopy studies of individual ion impacts in Pt and Ge.

Release of merozoites from Plasmodium falciparum -infected erythrocytes could be mediated by a non-explosive event

1999 ◽  
Vol 85 (8-9) ◽  
pp. 621-624 ◽  
Author(s):  
Enrique Winograd ◽  
Carlos A. Clavijo ◽  
Leyla Y. Bustamante ◽  
Martiza Jaramillo
Keyword(s):  
Plasmodium Falciparum ◽  
Explosive Event
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