Flinn-Engdahl regionalization

The Flinn-Engdahl regions (or F-E regions) comprise a set of contiguous seismic zones which cover the Earth's surface. In seismology, they are the standard for localizing earthquakes. The scheme was proposed in 1965^[1] by Edward A. Flinn and E. R. Engdahl. The first official definition was published in 1974^[2] and later revised in 1995.^[3] Since that time, region outlines and numbers have remained unchanged, but region names have changed to reflect official place name changes, e.g. the Queen Charlotte Islands have been known as Haida Gwaii since 2010.

Because each F-E region is composed of 1x1 degree blocks with integer latitudes and longitudes, the borders of the F-E regions may differ from political boundaries. For instance, the F-E region 545 ("Northern Italy") also includes parts of France, Switzerland, Austria and Slovenia. After the 1995 revision there are 754 F-E regions, sequentially numbered from 1 to 757 with three gaps (172, 299 and 550) at dissolved regions. The seismic regions are grouped into 50 larger geographic regions.

Flinn-Engdahl regions in geoJSON format.

[1]

[2]

[3]

Number	Region	Notes
Alaska – Aleutian arc
1	Central Alaska
2	Southern Alaska
3	Bering Sea
4	Komandorsky Islands Region
5	Near Islands, Aleutian Islands
6	Rat Islands, Aleutian Islands
7	Andreanof Islands, Aleutian Islands
8	Pribilof Islands, Alaska Region
9	Fox Islands, Aleutian Islands
10	Unimak Island Region, Alaska
11	Bristol Bay
12	Alaska Peninsula
13	Kodiak Island Region, Alaska
14	Kenai Peninsula, Alaska
15	Gulf of Alaska
16	South of Aleutian Islands
17	South of Alaska
Southeastern Alaska to Washington
18	Southern Yukon Territory, Canada
19	Southeastern Alaska
20	Off Coast of Southeastern Alaska
21	West of Vancouver Island
22	Haida Gwaii Region	islands renamed in 2010^[4]
23	British Columbia, Canada
24	Alberta, Canada
25	Vancouver Island, Canada Region
26	Off Coast of Washington
27	Near Coast of Washington
28	Washington–Oregon Border Region
29	Washington
Oregon, California and Nevada
30	Off Coast of Oregon
31	Near Coast of Oregon
32	Oregon
33	Western Idaho
34	Off Coast of Northern California
35	Near Coast of Northern California
36	Northern California
37	Nevada

List of seismic regions

Alaska – Aleutian arc

Southeastern Alaska to Washington

Oregon, California and Nevada

Baja California and Gulf of California

Mexico – Guatemala area

Central America

Caribbean loop

Andean South America

Extreme South America

Southern Antilles

New Zealand region

Kermadec – Tonga – Samoa Basin area

Fiji Islands area

Vanuatu Islands

Bismarck and Solomon Islands

New Guinea

Caroline Islands area

Guam to Japan

Japan – Kuril Islands – Kamchatka Peninsula

Southwestern Japan and Ryukyu Islands

Taiwan area

Philippine Islands

Borneo – Sulawesi

Sunda arc

Myanmar and Southeast Asia

India – Xizang – Sichuan – Yunnan

Southern Xinjiang to Gansu

Lake Issyk-Kul to Lake Baykal

Western Asia

Middle East – Crimea – Eastern Balkans

Western Mediterranean area

Atlantic Ocean

Indian Ocean

Eastern North America

Eastern South America

Northwestern Europe

Africa

Australia

Pacific Basin

Arctic zone

Eastern Asia

Northeastern Asia, Northern Alaska to Greenland

Southeastern and Antarctic Pacific Ocean

Galápagos Islands area

Macquarie loop

Andaman Islands to Sumatra

Baluchistan

Hindu Kush and Pamir area

Northern Eurasia

Antarctica

References

External links