Alaska

Washington

Wyoming

Hawaii

Oregon

None

A world map showing volcanoes active between 1800 and 2020. Volcanoes are scattered globally, with notable concentrations in the western US, Mexico, Central America, the Andes, the Mediterranean, East Africa, Southeast Asia, and the Pacific Ring of Fire.

Time series map animation showing locations of significant volcanic eruptions from 1800 to 2019. Use timeline controls at bottom of the map to display data by time period.

Volcanoes

World

NOAA

Florida

Rhode Island

Maine

Nova Scotia

Virginia

Delaware

Prince Edward Island

North Carolina

New Brunswick

British Columbia

Newfoundland and Labrador

New Jersey

Massachusetts

Georgia

New York

Maryland

California

A map illustrates the distribution of calcium carbonate in modern surface sediments globally, with highest concentration found in the Caribbean, Mediterranean, and South Pacific and lowest concentration dominating the North Pacific, and Southern Ocean.

Percentage of ocean surface comprised of calcium carbonate.

Distribution of Calcium Carbonate in Modern Surface Sediments

The distribution is represented as a percentage by weight. Areas with the least calcium carbonate, ranging from 0 percent to 20 percent, are marked in very light blue and are prevalent in large parts of the Pacific Ocean, particularly around Samoa, the South Pacific, and parts of the Indian Ocean. Light blue regions, representing 20 percent to 40 percent calcium carbonate, cover parts of the North Atlantic Ocean, including areas around Cuba, the western coast of Africa near Senegal and Mauritania, and the southern Indian Ocean near Madagascar. Medium blue areas, indicating 40 percent to 60 percent calcium carbonate, include regions in the North Atlantic Ocean, off the coast of the United Kingdom and France, the Mediterranean Sea, parts of the Arabian Sea, and the South Pacific Ocean. Blue-green regions, with 60 to 80 percent calcium carbonate, are seen in the central Atlantic Ocean, areas around the Caribbean including Cuba and Guatemala, the western coast of Africa near Gabon and Angola, and the Indian Ocean. The highest concentration of calcium carbonate, 80 percent to 100 percent, marked in dark green, is found in regions of the North Atlantic Ocean, around the Bahamas and north of Cuba, parts of the South Atlantic Ocean near the eastern coast of South America, the central Pacific Ocean, and the northern Indian Ocean near Sri Lanka.

Oceans

WDC-MARE Reports

Percent by weight

Northwest Territories

Nunavut

Texas

Louisiana

Alabama

Connecticut

Québec

Ontario

A map shows ocean climate zones with different colors indicating Equatorial, Tropical, Subtropical, Temperate, Subpolar, and Polar zones.&nbsp;

Ocean Climate Zones

The map illustrates the various ocean climate zones around the globe:Equatorial Zone: Located around the equator, covering regions like the central Pacific Ocean, the equatorial Atlantic Ocean, and parts of the Indian Ocean near the equator.Tropical Zone: Found just north and south of the equatorial zones, covering areas like the northern Indian Ocean, parts of the Atlantic Ocean near the equator, and the central Pacific Ocean.Subtropical Zone: Located further from the equator, covering areas like the southern parts of the North Atlantic and North Pacific Oceans, northern parts of the South Atlantic and South Pacific Oceans, and parts of the Indian Ocean.Temperate Zone: Found in mid-latitude regions, covering areas like the North Atlantic Ocean off the coast of Europe and North America, the North Pacific Ocean off the coast of North America, and the Southern Ocean surrounding Antarctica.Subpolar Zone: Located in higher latitude regions, covering areas like the North Atlantic Ocean near Greenland, the North Pacific Ocean near Alaska, and parts of the Southern Ocean.Polar Zone: Found in the polar regions, covering areas like the Arctic Ocean and the Antarctic region.Warm Currents: Include currents such as the Gulf Stream in the North Atlantic Ocean, the Kuroshio Current in the North Pacific Ocean, and the Brazil Current in the South Atlantic Ocean.

Display by:	Volcanoes	Distribution of Calcium Carbonate in Modern Surface Sediments					Ocean Climate Zones
	Volcanoes	0 - 20	20 - 40	40 - 60	60 - 80	80 - 100	Equatorial	Tropical	Subtropical	Temperate	Subpolar
Wyoming	1
Georgia				0.250%
Alaska	1	0.671%								2.05%	0.827%
Northwest Territories											1.67%
Florida				0.637%		0.865%		2.09%
Rhode Island		4.44%								8.19%
Washington	2	1.05%								0.763%
Nunavut											4.30%
Maine		0.825%								1.22%
Nova Scotia		3.14%								8.68%
Virginia		0.818%							0.104%	1.74%
Delaware		2.57%								4.66%
Prince Edward Island		19.7%								54.8%
Texas							0.188%
Louisiana								3.62%
Hawaii	3	2.48%	13.2%		3.56%	1.64%	2.56%	35.3%
North Carolina		1.08%							2.25%
Oregon	2	0.120%								0.245%
New Brunswick		0.602%								2.16%
Alabama								0.128%
British Columbia		0.699%								1.39%
Newfoundland and Labrador		1.91%								1.85%	0.552%
New Jersey		1.77%								3.26%
Connecticut										0.661%
Massachusetts		5.64%			0.220%				0.220%	7.89%
New York		3.00%								1.81%
Maryland		2.92%								3.11%
Québec										0.264%	0.352%
Ontario											0.107%
California		0.408%	0.184%						0.550%	0.247%

MapMaster 3

Volcanoes