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Astronomy Picture of the Day - Moon and Smoke Rings from Mt. Etna
NASA ^
| 22 Apr, 2024
| Image Credit & Copyright: Dario Giannobile
Posted on 04/22/2024 3:06:47 PM PDT by MtnClimber
Explanation: Yes, but can your volcano do this? To the surprise of some, Mt. Etna emits, on occasion, smoke rings. Technically known as vortex rings, the walls of the volcano slightly slow the outside of emitted smoke puffs, causing the inside gas to move faster. A circle of low pressure develops so that the emitted puff of volcanic gas and ash loops around in a ring, a familiar geometric structure that can be surprisingly stable as it rises. Smoke rings are quite rare and need a coincidence of the right geometry of the vent, the right speed of ejected smoke, and the relative calmness of the outside atmosphere. In the featured image taken about two weeks ago from Gangi, Sicily, Italy, multiple volcanic smoke rings are visible. The scene is shaded by the red light of a dawn Sun, while a crescent Moon is visible in the background.
TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; etna; mountetna; mtetna; nasa; science
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To: MtnClimber
2
posted on
04/22/2024 3:07:33 PM PDT
by
MtnClimber
(For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)
To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; AFPhys; Agatsu77; America_Right; ...
Pinging the APOD list
🪐 🌟 🌌 🍔
3
posted on
04/22/2024 3:08:45 PM PDT
by
MtnClimber
(For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)
To: MtnClimber
4
posted on
04/22/2024 3:21:16 PM PDT
by
aquila48
(Do not let them make you "care" ! Guilting you is how they control you. )
To: MtnClimber
Wonder if they smell like rich cuban cigars.
5
posted on
04/22/2024 3:28:56 PM PDT
by
Track9
(If you want to know about human nature, read a power tool user manual. )
To: MtnClimber
A volcano sending up smoke rings is cool.
But getting mooned by a volcano, that’s just wrong, bigly.
6
posted on
04/22/2024 3:40:29 PM PDT
by
DannyTN
The rest of the keywords' topics, sorted:
- Lord of the Rings: Rare Display of Vortex Rings over Italy's Mount Etna Dazzles Observers [04/08/2024]
- Rare volcanic vortex rings puff out of Mount Etna [04/07/2024]
- Mount Etna is Europe's Most Active Volcano. Can You Still Visit During an Eruption? [09/27/2023]
- Mount Etna eruption disrupts Sicily's troubled Catania airport [08/14/2023]
- Mount Etna eruption grounds flights in Sicily with clouds of ash [05/22/2023]
- Ice Cores Reveal Huge Volcanic Eruptions, Bigger Than Anything in The Last 2,500 Years [03/21/2022]
- Mount Etna roars again, sends up towering volcanic ash cloud [02/21/2022]
- Mount Etna Volcano Eruption Update; 1 Kilometer High Lava Fountains, Pyroclastic Flows [02/13/2022]
- Astronomy Picture of the Day - Light Pillar over Volcanic Etna [11/15/2021]
- Etna volcano (Italy): violent eruptive episode, parts of SE crater collapse into dangerous pyroclastic flows [10/23/2021]
- Striking new video captures moment when Mount Etna recently erupted [01/21/2021]
- Hidden World of Undersea Volcanoes and Lava Flows Discovered Off Italian Coast [09/26/2019]
- Mount Etna eruption causes airspace closure [12/25/2018]
- VOLCANO WARNING Panic in Sicily as Mount Etna BLOWS in huge eruption on Italy holiday isle [02/28/2017]
- Fire and ash as Mount Etna erupts for the first time in two years [12/04/2015]
- Enormous monolith, carved 9350 years ago, found under Mediterranean Sea [08/08/2015]
- Europe's most active volcano, Mount Etna, erupts - video [06/16/2014]
- It's raining volcanic ash and rocks in Sicily. [video only] [11/26/2013]
- Mount Etna eruption lights up Sicilian sky [10/28/2013]
- Mount Etna eruption closes airports and 'knocks clocks 15 minutes fast' [07/13/2011]
- Mt Etna erupting live....now. (Sicily) [07/09/2011]
- Tsunami Waves Reasonably Likely To Strike Israel, Geo-archaeological Research Suggests [10/26/2009]
- Did Noah's Flood start in the Carmel? [12/10/2008]
- Did Noah's Flood start in the Carmel? [12/10/2008]
- Did Noah's Flood start in the Carmel? [12/10/2008]
- Geology Picture of the Week, June 22-28, 2008: Current Etna eruption (great images) [06/23/2008]
- Tsunami Or Melting Glaciers: What Caused Ancient Atlit To Sink? [06/04/2008]
- Geology Picture of the Week, May 11-17, 2008: Grab Bag [05/15/2008]
- Lightning Bolts appear above volcano in Chile + Etna volcano rumbles back to life in Sicily [05/13/2008]
- GEOPHYSICS: Ancient Cataclysm Marred the Med [12/09/2006]
- Landslide At Mt. Etna Generated A Large Tsunami In The Mediterranean Sea Nearly 8,000 Years Ago [11/29/2006]
- Geology Picture(s) of the Week, November 12-18, 2006: Etna (current), Stunning Haifoss (Iceland) [11/14/2006]
- Mt. Etna webcam (vanity) [09/12/2006]
- Geology Picture of the Week, September 10-16, 2006: Fresh activity on Etna (with Webcam link) [09/11/2006]
- Geology Picture of the Week, July 16-22, 2006: Godafoss (Iceland), LOTR, and volcano news [07/20/2006]
- Etna Awakes With Storm Of Fire And Lava [07/17/2006]
- Massive underwater volcano discovered off Sicily [06/22/2006]
- Geology Pictures of the Week, October 24-31, 2004: Ghostly Gas, Bone Dry, Black Dragon's Caldron [10/26/2004]
- Geology Pictures of the Week, October 24-31, 2004: Ghostly Gas, Bone Dry, Black Dragon's Caldron [10/26/2004]
- Geology Picture of the Week, October 17-23, 2004: Etna Otherworldly, plus Epidote [10/20/2004]
- Geology Picture of the Week, October 17-23, 2004: Etna Otherworldly, plus Epidote [10/20/2004]
- Geology Picture of the Week, October 10-16, 2004: Etna's slippery Slope (links to other eruptions) [10/14/2004]
- Geology Picture of the Week, October 10-16, 2004: Etna's slippery Slope (links to other eruptions) [10/14/2004]
- Geology Picture of the Week, October 3-9, 2004: Etna Eruption Caption Fun [10/05/2004]
- Geology Picture of the Week, October 3-9, 2004: Etna Eruption Caption Fun [10/05/2004]
- Geology Picture of the Week, September 26-October 2, 2004: Etna eruption (and live cam link) [09/27/2004]
- Geology Picture of the Week, September 26-October 2, 2004: Etna Eruption (and live cam link) [09/27/2004]
- Geology Picture of the Week, September 5-11, 2004: Etna Lava, Fournaise Bonus [09/10/2004]
- Geology Picture of the Week, September 5-11, 2004: Etna Lava, Fournaise Bonus [09/10/2004]
- Geology Pictures of the Week, March 14-20, 2004: Volcanoes from Space Trifecta [03/16/2004]
- Geology Pictures of the Week, March 14-20, 2004: Volcanoes from Space Trifecta [03/16/2004]
- Signs Of An Eruption [08/29/2003]
- Astronomy Picture of the Day 3-31-03 [03/30/2003]
- MOUNT ETNA DANGER [02/06/2003]
- Astronomy Picture of the Day 1-02-03 [01/01/2003]
- Geology Picture of the Week Addendum [12/12/2002]
- Geology Picture of the Week, November 10-16, 2002 [11/12/2002]
- Geology Picture of the Week, November 10-16, 2002 [11/12/2002]
- Geology Picture of the Week Bonus: WOW - Etna Eruption from Space Station [11/05/2002]
- Geology Picture of the Week Bonus: WOW - Etna Eruption from Space Station [11/05/2002]
- Geology Picture of the Week, November 2-9, 2002 [11/04/2002]
- Geology Picture of the Week, November 3-9, 2002 [11/04/2002]
- Etna's fresh activity keeps Sicily on tenterhooks [10/29/2002]
- Quake Rattles Erupting Etna [10/29/2002]
- Geology Picture (Movie) of the Week, Oct. 27-Nov. 2, 2002 [10/28/2002]
- Geology Picture (Movie) of the Week, October 27-November 2, 2002 [10/28/2002]
- Europe's Biggest Volcano Spews Lava As Earthquakes Signal Latest Return To Life [10/27/2002]
7
posted on
04/23/2024 2:18:35 AM PDT
by
SunkenCiv
(Putin should skip ahead to where he kills himself in the bunker.)
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