Arizona

Utah

District of Columbia

Florida

Idaho

New Hampshire

Rhode Island

Vermont

Washington

Wyoming

Montana

Maine

North Dakota

Kentucky

Virginia

Delaware

Mississippi

West Virginia

Nebraska

Texas

Missouri

Louisiana

North Carolina

Oregon

Alabama

New Mexico

Kansas

Wisconsin

New Jersey

South Carolina

Michigan

Connecticut

Pennsylvania

Colorado

Nevada

Massachusetts

Georgia

New York

Maryland

Oklahoma

Tennessee

California

Arkansas

South Dakota

Ohio

Indiana

Minnesota

Iowa

Illinois

None

A map shows the p H levels of acid rain in the U.S. States like Ohio and Pennsylvania have the lowest p H levels (4.50 to 4.59 p H, black). States like Arizona and Nevada show the highest p H levels (greater than or equals 5.30 p H, light yellow).

Average acidity of precipitation in the United States. Lower pH values represent greater acidity.

Acid Rain (U.S.)

United States

Geosystems: Intro to Physical Geography

Acid Rain

Alaska

Hawaii

British Columbia

A world map of earthquake activity from 2000 to 2019. Circles of varying sizes represent earthquake magnitudes, with larger circles for higher magnitudes. Significant activity is noted in Colombia, Iran, Turkey, Tanzania, and the North Atlantic Ocean.

Time series data showing locations and Richter scale magnitudes of significant earthquakes from 1800 BCE to 2019. Use timeline controls at bottom of the map to display data by time period.

Earthquakes

World

NOAA

Richter scale magnitude

Nunavut

Québec

A map shows the ethnic and cultural regions in U S. French-Canadian (orange) in Quebec, Black belt (blue) in the southeastern states. Hispanic borderlands (mustard) in south states. Navajo Reservation (yellow) in Arizona, and Nunavut shaded grey.

Distinctive contemporary cultural regions of North America

Ethnic and Cultural Regions

North America

nature

Yukon

Northwest Territories

Nova Scotia

Prince Edward Island

Saskatchewan

New Brunswick

Newfoundland and Labrador

Alberta

Manitoba

Ontario

A map shows areas of insolation (incoming solar radiation) across the world, categorized by watts per square meter.

Average annual levels of solar radiation reaching the Earth's surface

Insolation

The map illustrates global insolation, showing variations in incoming solar radiation from the tropics to the polar regions. In the Northern Hemisphere, high insolation (220 to 280 plus watts per square meter), highlighted as dark green to dark red spans from northwestern Mexico through southern Texas, Florida, and the Caribbean, across the Atlantic to North Africa and Southwest Asia, with peaks in the eastern Sahara and Arabian Peninsula. In the Southern Hemisphere, high insolation areas stretch from East Africa to South Africa and across the Indian Ocean to most of Australia, with other high insolation zones in the Central Pacific and south-central South America. Middle insolation values (120 to 219 watts per square meter), highlighted as light blue to green, are found between 50 degrees north and 50 degrees south latitude, excluding high insolation regions. Low insolation areas (80 to 119 watts per square meter), highlighted as blue to light blue, are located north of the 50-degree lines to the poles in North America, the North Atlantic, and Eurasia, and around the Southern Ocean in Antarctica. The lowest insolation values (less than 80 watts per square meter), highlighted as dark blue, are in the ocean east of northern Greenland.

Watts per square meter (W/m²)

Indo-European (blue): Americas, Europe, Asia, Oceania. Africa: Afro-Asiatic (light blue), Niger-Congo (purple), Nilo-Saharan (light green). Asia: Sino-Tibetan (brown), Dravidian (green), Altaic (blue). Australia: Indo-European, Aboriginal (bright yellow).

The world's major language families. Language families are groups of languages related through descent from a common ancestral language.

Display by:	Acid Rain									Earthquakes									Ethnic and Cultural Regions							Insolation										Language Families
	4.50–4.59 pH	4.60–4.69 pH	4.70–4.79 pH	4.80–4.89 pH	4.90–4.99 pH	5.00–5.09 pH	5.10–5.19 pH	5.20–5.29 pH	≥5.30 pH	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Earthquakes	Acadiana	Black Belt	Cuban South Florida	French-Canadian Quebec	Hispanic borderlands	Navajo Reservation	Nunavut	240–259	220–239	200–219	180–199	160–179	140–159	120–139	100–119	80–99	Less than 80	Amerindian and Indo-European	Eskimo-Aleut	Indo-European
Alaska											1																						28.4%	69.2%	2.23%	27.6%	0.108%	0.153%
Arizona								1.23%	98.8%														48.4%	14.0%		44.2%	33.7%	22.1%								19.5%		80.5%
Utah								1.69%	98.3%															1.23%				70.0%	8.89%	2.63%						0.663%		99.3%
Yukon																																	100%			88.3%	11.6%	0.107%
Northwest Territories																																2.63%	82.4%	14.9%		52.2%	7.85%	4.66%
District of Columbia			100%																	100%										100%								100%
Florida				1.32%	13.8%	25.9%															3.77%						32.7%	67.3%										98.8%
Idaho								4.63%	95.4%																					78.1%	21.9%							100%
New Hampshire				72.0%	27.9%																										100%							100%
Rhode Island			2.00%	3.88%																											100%							94.9%
Vermont				95.7%	4.07%																										100%							100%
Washington								23.4%	70.9%																					1.22%	98.8%							0.121%
Wyoming									100%																				12.4%	87.6%								100%
Nunavut																									98.3%							1.36%	33.1%	65.5%		8.72%	0.383%	0.977%
Montana								9.26%	90.7%																					14.7%	85.3%							100%
Maine					17.3%	69.8%	10.8%																								99.8%	0.153%						0.167%
North Dakota									100%																						100%							100%
Kentucky			1.72%	54.3%	1.61%	9.53%																							46.4%	53.6%								100%
Nova Scotia																															52.4%	47.6%						18.3%
Virginia			3.50%	1.66%	15.4%															29.1%									2.49%	97.5%								99.7%
Delaware			17.4%	81.8%																										100%								99.2%
Prince Edward Island																																100%						94.3%
Saskatchewan																															42.7%	57.2%				12.5%		87.5%
Mississippi					14.3%	79.0%	5.27%													63.6%								82.1%	17.9%									100%
West Virginia		7.63%	45.0%	12.8%	8.92%																									99.2%	0.827%							100%
Nebraska									100%																				9.53%	90.5%								100%
Texas					8.53%	1.49%	4.74%	5.19%	56.4%														56.1%			5.26%	58.9%	35.9%										99.8%
Missouri						26.1%	26.9%	12.0%	34.2%																				66.4%	33.6%								100%
Louisiana					41.6%	42.5%	8.80%	4.48%	2.23%										20.6%	48.2%							26.8%	73.2%										0.147%
Hawaii																											2.67%	97.3%										1.39%
North Carolina			1.35%	37.2%	1.72%	9.88%														54.7%									73.0%	27.0%								99.4%
Oregon								2.68%	97.3%																					96.3%	3.75%							99.9%
New Brunswick																															47.2%	52.8%						99.2%
Alabama					84.6%	13.4%														48.6%								66.2%	33.8%									99.9%
New Mexico								4.15%	91.3%														89.9%	3.98%		15.5%	33.9%	49.1%										100%
Kansas									100%																			5.90%	91.6%	2.46%								100%
Wisconsin						4.01%	46.8%	27.3%	21.3%																						100%							100%
British Columbia																															21.7%	31.5%	46.8%			63.0%		0.157%
Newfoundland and Labrador																																29.5%	69.1%	1.36%		34.1%	14.7%	24.7%
New Jersey		5.98%	36.6%	32.6%	23.7%																									51.6%	48.4%							99.1%
South Carolina				33.6%	64.2%	2.08%														70.7%									100%									99.8%
Michigan				24.0%	10.0%	4.73%	13.3%																								100%							100%
Alberta																															29.7%	53.1%	17.2%			55.4%		0.298%
Connecticut			49.9%	50.0%																											100%							99.9%
Pennsylvania	3.58%	34.8%	29.1%	10.8%																										19.4%	80.6%							100%
Colorado							1.85%	3.55%	88.3%														17.0%					48.1%	51.6%	0.332%								100%
Nevada									100%	1																	1.58%	63.4%	31.2%	3.86%								100%
Massachusetts				98.2%																									0.220%		99.8%							0.557%
Georgia				7.01%	3.21%	2.51%	3.47%													62.2%								48.3%	51.7%									99.9%
New York		4.25%	52.6%	35.3%																											100%							2.63%
Maryland			12.5%	29.8%	10.3%															16.4%										100%								98.1%
Québec																						99.6%									10.4%	38.5%	41.0%	10.1%		24.9%	34.9%	0.469%
Manitoba																															26.0%	66.7%	7.35%			4.25%		66.4%
Oklahoma							2.73%	5.70%	91.6%																			82.2%	17.8%									100%
Tennessee			5.63%	19.5%	14.5%	3.55%														2.75%									100%									100%
Ontario																															30.4%	56.0%	13.7%			49.9%		50.0%
California									99.7%	1													49.1%			2.69%	22.7%	49.4%	19.9%	5.25%								99.7%
Arkansas						17.5%	40.8%	7.44%	10.2%											20.3%								50.1%	49.9%									100%
South Dakota									100%																					50.1%	49.9%							100%
Ohio	5.07%	9.56%	59.7%	23.0%																										51.6%	48.4%							100%
Indiana			12.8%	4.37%	8.75%	5.18%																							0.561%	79.2%	20.2%							100%
Minnesota							2.86%	4.42%	92.3%																						99.9%							100%
Iowa								1.50%	98.5%																					77.7%	22.3%							100%
Illinois					39.9%	27.0%	15.0%	3.08%	9.73%																				11.8%	73.8%	14.4%							100%

MapMaster 3

Acid Rain