Sasha's Flower Garden

With intermittent movement of the seabed along geological fault lines, large volumes of water may suddenly lifted or sunk touch, especially if an earthquake takes place in kilometers deep. On the surface, occasionally occurs over a large area with a wave height of “only” two feet and a large wavelength (hundreds of kilometers long). The wave moves in all directions away from the operative field, with the emergence area secondary waves arise. Depending on the movement of the seafloor on either side of the fault line, leaving only a trough (a hole in the water) or just a crest.

In the ocean passing such a long wave with the naked eye can hardly noticeable: wind waves can reach a lot higher altitudes (up to 10 meters) but have only a wavelength of 200 meters. Accurate depth gauges and specialized satellites the tsunami waves on the ocean direct measurement. When the tsunami reaches shallower coastal areas, the propagation velocity slows considerably. It is the wave higher, depending on the location along the coast (bay, reef, headland, fjord) and size of the wave on the open sea to several tens of meters above normal tide line. The energy that is stored in a tsunami wave is much larger than a single wind wave. The water takes a tsunami to the seabed, while a wave by the wind only at the surface of the sea marks. Upon reaching a critical level on the coast breaks the tsunami and powerful roles spurs further inland. This powerful tsunami loses its power ultimately to turbulence and friction with sea floor, coastal, vegetation and buildings.

A wind wave reaches a speed of 40 km / h, but a tsunami can travel at a much higher speed. The period of the tsunami (the time between passing two peaks) is a quarter to one hour. In deep water, as in the oceans, tsunamis reach their highest speed up to 1000 kilometers per hour. Vg the speed of the wave depends on the water depth in the relationship:

    v_g = \ sqrt (gd)

Which applies:

    * Vg is the wave speed in m s-1
    * G is the gravitational acceleration of 9.81 m s-2
    * D is the depth in m

In a larger earthquake, the wave front of a tsunami to hundreds of kilometers wide. This wave propagates from a source on line, so the energy content per meter on the distance hardly diminishes. Such a tsunami will not usually go unnoticed – for example, in December 2004 in the Indian Ocean near Sumatra. Unlike smaller tsunami waves that arise as a point source (like a stone thrown into the water, but also like a landslide on a volcanic slope in an isolated island in the middle of the ocean). In that case, the energy content decreases quadratically with radial distance. Only very large submarine landslides, volcanic eruptions and meteorite impacts therefore lead to significant tsunamis.

Source : http://nl.wikipedia.org/wiki/Tsunami

See Also: Sending Flowers, Online Florist, Florist

 La Monte fountains (Montia fontana) is a perennial or biannual family of Portulacaceae Montia and gender. Mostly mountainous, it is specific to wetlands and acid in Europe.

Description

A plant of 10-30 cm and a light green, it forms tight mats and floating in deep water. His numerous elongated stems are first soft and then lying rebounded once they produce rootlets stabilizing near the main root (plant radicant). The leaves are about to spatulate obtuse.  

The flowers grow in the cyme, lateral to the rod and spring from a node with two equal and opposite leaves. Finally, the seed capsules are finely pitted black and shiny. Autogamy pollinated seeds are dispersed by gravity, and therefore move with water currents (plant barochore).

Subspecies

    * Montia fontana subsp. amporitana (Sennen, 1911)
    * Montia fontana subsp. chondrosperma (Walters, 1953)
    * Montia fontana subsp. fontana (Maas, 1959)
    * Montia fontana subsp. variabilis (Walters, 1953)

Ecology

 
Montia fontana is present throughout Europe and especially in Central Europe and Boreal. In France, it is present on the entire metropolitan area, including Corsica.

La Monte and the fountains heliophile acidophilus and grows in streams, springs and ditches, on ground silica and mainly in the mountains.

Use

Like watercress (Nasturtium officinale), the emerged part of the plant are edible.

Source: http://fr.wikipedia.org/wiki/Montia_fontana

See Also: idul fitri, hamper hari raya, hari raya hampers

Volcanic Fissure
A volcanic fissure is a linear volcanic fissure through which lava erupts, usually without any explosive activity. The crack is usually only a few meters wide and can be several kilometers long. They can cause huge flows of basalt and lava channels. They are difficult to recognize from the ground and from space, as it has a central boiler and the surface is mostly flat. The volcano can usually be seen as a crack in the ground or the seabed. Narrow cracks can be filled with lava that hardens. As erosion removes the surrounding area, the mass of lava can remain on the surface like a dam. The levees that hold the cracks reach the surface from depths of a few kilometers. Fissures are commonly found in or along the rift zones, such as Iceland and the Great Rift Valley of Africa.

In Iceland, volcanic fissures are often long fissures parallel to the rift zone where lithospheric plates are diverging. Some Renewed eruptions generally occur from new parallel fractures from hundreds to thousands of meters of the first cracks. This distribution usually builds a thin lava plateau rather than a single volcanic edifice. The Laki fissure system produced the largest eruption in recorded history in the form of basaltic flow during the eruption of Eldgjá in 934 a. C., which dropped 19.6 km ³ of lava.

Radial volcanic fissures Hawaiian volcanoes produce “curtains of fire” as lava fountains erupt along a portion of a fissure. These ramps lead to lower basaltic spatter on both sides of the crack. Some isolated lava fountains along the fissure produce small craters and cinder cones. The fragments that form a spatter cone are hot and plastic enough to weld, between them, while the fragments that form a cinder cone remain separate because of their lower temperature.

Source: http://es.wikipedia.org/wiki/Fisura_volcánica

See Also: idul fitri, hamper hari raya, hari raya hampers