User:Rfl

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Penrose Tribar

Rafał Pocztarski

Administrator of the English Wikipedia since 2004 (original nomination)

My Contributions: All · Articles · Talk · User talk · Wiki · Wiki talk · Page Deletions · Current rights

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Misc

Special:WhatLinksHere

Picture of the day

Featured pictures · visible · candidates

Picture of the day

Bathymetry is the study of the underwater depth of sea and ocean floors, lake floors, and river floors. It has been carried out for more than 3,000 years, with the first recorded evidence of measurements of water depth occurring in ancient Egypt. Bathymetric measurements are conducted with various methods, including depth sounding, sonar and lidar techniques, buoys, and satellite altimetry. However, despite modern computer-based research, the depth of the seabed of Earth remains less well measured in many locations than the topography of Mars. Bathymetry has various uses, including the production of bathymetric charts to guide vessels and identify underwater hazards, the study of marine life near the bottom of bodies of water, coastline analysis, and ocean dynamics, including predicting currents and tides. This video, created by the Scientific Visualization Studio at NASA's Goddard Space Flight Center, simulates the effect on a satellite world map of a gradual decrease in worldwide sea levels. As the sea level drops, more seabed is exposed in shades of brown, producing a bathymetric map of the world. Continental shelves appear mostly by a depth of 140 meters (460 ft), mid-ocean ridges by 3,000 meters (9,800 ft), and oceanic trenches at depths beyond 6,000 meters (20,000 ft). The video ends at a depth of 10,190 meters (33,430 ft) below sea level – the approximate depth of the Challenger Deep, the deepest known point of the seabed.Video credit: NASA / Goddard Space Flight Center / Horace Mitchell, and James O'Donoghue

Selected anniversaries

December 30: Rizal Day in the Philippines (1896)

Pro-government rally in Tehran, Iran

• 999 – In Ireland, the combined forces of Munster and Meath crushed a rebellion by Leinster and Dublin.
• 1940 – The Arroyo Seco Parkway, one of the first freeways built in the U.S., connecting downtown Los Angeles with Pasadena, California, was officially dedicated.
• 1954 – The Finnish National Bureau of Investigation was established to consolidate criminal investigation and intelligence into a single agency.
• 1969 – Philippine president Ferdinand Marcos began his second term after being re-elected in a landslide.
• 2006 – Saddam Hussein, the former president of Iraq, was executed after being found guilty of crimes against humanity by the Iraqi High Tribunal.
• 2009 – Pro-government counter-demonstrators held rallies (pictured) in several Iranian cities in response to recent anti-government protests on the holy day of Ashura.

• Bernard Gui (d. 1331)
• LeBron James (b. 1984)
• V (b. 1995)
• Erica Garner (d. 2017)

More anniversaries:

• December 29
• December 30
• December 31

In the news

Current events:

Jimmy Carter

• Former president of the United States Jimmy Carter (pictured) dies at the age of 100.
• Jeju Air Flight 2216 crashes at Muan International Airport, South Korea, killing 179 people.
• Acting president and prime minister of South Korea Han Duck-soo is impeached by the National Assembly.
• Former prime minister of India Manmohan Singh dies at the age of 92.

Ongoing:

• Israel–Hamas war
• Israeli invasion of Lebanon
• Russian invasion of Ukraine
  • timeline
• Sudanese civil war
  • timeline

Recent deaths:

• Charles Dolan
• Richard Perry
• Greg Gumbel
• Don Martina
• Joanne Pierce Misko
• Osamu Suzuki

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