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By Ann Antkiw (EXPLORING COSTA RICA 2006 - THE TICO TIMES)
GEOGRAPHY & CLIMATE
COSTA
RICA, though diminutive in size, is geographically a land of extreme contrasts.
Straddling a rugged mountain chain, its topography is responsible for constant
seismic activity, spewing volcanoes, distinctive climatic zones and immense
biodiversity. Lying within the tropics (between 8 and 11 degrees north of the
equator) the country has two distinctive seasons, 'dry' and 'rainy'.
However,
elevation and temperatures temper this stereotypical tropical climate and
climatic conditions vary considerably. Hot steamy jungles, fertile
pasturelands, chilly highlands and mountain peaks make Costa Rica a
land of spellbinding and infinite variety.
Shifting
Cocos and Caribbean tectonic plates, plus
local faults cause thousands of tremors yearly, some short and jarring, others
longer and rolling. Geologists claim this frequency relieves pressure and keeps
at bay a "really big one." On November 20, 2004, a prolonged 6.2
Richter seal earthquake in the Central Pacific zone shook the country. Areas
near the epicenter suffered serious structural damage and six deaths, five from
heart failure, were partially blamed on the quake.
A
devastating earthquake in 1991 measuring 7.5 on the Richter scale struck the Caribbean
coastal regions, causing extensive damage to the port city of Limon, afl' exposing
coral reefs when the coastline rose by more than a meter. San Jose has suffered several damaging quakes
since 1910, when most of the colonial capital of Cartago was leveled. Other
quakes measuring 4.9 to 6.5 near the capital city of Alajuela,
the Caribbean slope town of Turrialba,
in the Los Santos area, plus the Central Pacific community of Quepos resulted
in varying degrees of damage. Seismic activity has been recorded since 1638,
but predictions are still ambiguous.
After
the catastrophic earthquake in the Indian Ocean and the subsequent Tsunami,
Costa Rica is paying more attention to the possibility of its happening here.
Together with Central American scientists, they are working to initiate a regional
warning system on both coasts.
Mountain
chains from the northwestern Nicaraguan border to the southeastern Panamanian
border split the country in two. The Cordillera de Guanacaste, the northern-most
range, boasts the steaming volcano on de la Vieja. Further south in the Cordillera
de Tilaran the most active and volcano, Arenal, continually spews forth rocks
and lava. These eruptions are a major tourist attraction. In the Cordillera Central,
active Volcano Poas belches sulphurous gases, while Irazu last erupted in 1963,
showering San Jose
with ash. Both are visible from the city, but Turrialba, part of the same
range, has been dormant since 1866. Sleeping volcanoes - Tenorio, Miravalles,
Orosi, Santa Maria,
Cacho Negro, Platanar, and Barva could grumble to life anytime. Extinct
volcanoes number 200 on land and at sea.
Geologically
older but non-volcanic, the southeastern Cordillera de
Talamanca is the largest, most rugged, remote massif in the country.
The highest peak Mt. Chirripo 3,819 m. (12,529 feet), experiences temperatures
below freezing and occasional light snowfalls. South of Cartago, the Inter-American Highway
starts to climb the Cerro de la Muerte rising from some 5,000 feet to 11,500
feet, where temperatures range from 5-20° C (41-68° F). The Bustamente in the central
Los Santos area, and the Costanera running along the southern Pacific coast are
lower-altitude undulating regions.
Over
half the country's population live in the fertile Central
Valley known for its abrupt changes in altitude, temperature and
landscape. It's home to the capital San Jose (1,160
m.), plus major cities - Alajuela, Heredia, Cartago, Turrialba and the Orosi Valley.
Rolling countryside and fertile volcanic soil make the upper elevations a prime
coffee-growing area, plus dairy farming and market gardening also flourish.
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Like to know more about the many micro-climates, rainforests of the Caribbean, Lake Arenal area and the dry and wet seasons?
Please click on 'EXPLORING COSTA RICA 2006' to order your copy.
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