It is known as the penumbra and the area in total shadow is the umbra
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It depends on where the earthquake occurs.
Text-shadow is a useful property that is implemented in most modern browsers. To use text-shadow in your CSS style sheets, there are four things you have to set when writing the declaration, how far to the right (or left) the shadow is from the actual text, how far below (or above) the shadow is from the text, how much blur the shadow should have, and finally what color the shadow should have. The first two declarations can be positive or negative; positive numbers cause the shadow to move to the right and below the text, while negative numbers cause the shadow to move to the left and above the text. Here's an example of how to use a text-shadow on an anchor when the user hovers over the anchor: a:hover { text-color: #FFFFFF; background-color: #0198E1; text-shadow: 2px 2px 2px #FFCC00; } When a user hovers over an anchor link the text color will turn white, the background will become a topaz blue, and will have a gold shadow around the text. You can declare multiple shadows on the same element if you want to have a cooler looking text-shadow. Here is an example: .cooltextshadow { text-shadow: 0 0 4px white, 0 -5px 4px #ff3, 2px -10px 6px #fd3, -2px -15px 11px #f80, 2px -25px 18px #f20; } This text-shadow declaration has 6 drop shadows declared each one offset from the previous one to make a really cool effect. Notice the negative numbers. This effect is mainly above the text and looks like the text is superheated or on fire.
A CSS box shadow effect is applied to the outer layer of an element while the filter drop-shadow, an experimental property, follows the rendered shape of any element including pseudo elements, such as a tootip with an arrow. A filter drop-shadow also takes into account the transparent aspects of a .png image.
To avoid reinforcement lapping zone and spliceing zone
describe what is a zone in ahydronic heating system