Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 22, 2021. Picture taken February 22, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Large streams of red hot lava shoot into the night sky as Mount Etna, Europe's most active volcano, continues to erupt, as seen from the village of Fornazzo, Italy February 23, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, continues to erupt, seen from Zafferana Etnea, Italy, February 21, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

The cable car, closed due to the coronavirus disease (COVID-19) emergency, is seen during a visit of alpine rescuers, members of the "Guardia di Finanza", a local police force, to a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

The cable car, closed due to the coronavirus disease (COVID-19) emergency, is seen as alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Mount Etna, Europe's highest and most active volcano, is seen as alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

An alpine rescuer, member of the "Guardia di Finanza", a local police force, holds volcanic debris as he visits a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

An alpine rescuer, member of the "Guardia di Finanza", a local police force, holds volcanic debris as he visits a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Mount Etna, Europe's highest and most active volcano, is seen as alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

An alpine rescuer, member of the "Guardia di Finanza", a local police force, visits a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Shadows are seen reflected on the ground next to a dog as alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

An alpine rescuer, member of the "Guardia di Finanza", a local police force, holds volcanic debris as he visits a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

An alpine rescuer, member of the "Guardia di Finanza", a local police force, holds volcanic debris as he visits a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Alpine rescuers, members of the "Guardia di Finanza", a local police force, visit a crater on Mount Etna, Europe's highest and most active volcano, near Catania, Italy, February 19, 2021. REUTERS/Antonio Parrinello

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, attends a court hearing in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

TV anchor and journalist Ksenia Sobchak attends a court hearing during the trial of anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, attends a court hearing in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, attends a court hearing in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, sits next to her son in a courtroom in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, arrives at a court building in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, attends a court hearing in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Anti-Kremlin activist Anastasia Shevchenko, who is accused of carrying out activities on behalf of Open Russia opposition group financed by exiled former oil tycoon Mikhail Khodorkovsky, attends a court hearing in the city of Rostov-On-Don, Russia February 18, 2021. REUTERS/Sergey Pivovarov

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, erupts, seen from Giarre, Italy, February 16, 2021. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY REFILE - CORRECTING ACTION

Streams of red hot lava flow as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Catania, Italy, February 16, 2021. REUTERS/Antonio Parrinello

Streams of red hot lava are seen as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Catania, Italy, February 16, 2021. REUTERS/Antonio Parrinello

Streams of red hot lava are seen as Mount Etna, Europe's most active volcano, leaps into action, seen from the village of Catania, Italy, February 16, 2021. REUTERS/Antonio Parrinello

Mount Etna, Europe's most active volcano, spews volcanic ash as it leaps into action, seen from the village of Catania, Italy February 16, 2021. REUTERS/Antonio Parrinello