To find the epicenter (the point on the earth's surface where an earthquake begins) during earthquakes, one need to view the seismogram (a record of the ground motion), and at least two other seismographs recorded for the same earthquake. Other instruments such as a map, a compass for sketching circles on the map, a ruler, and a pencil will also be used.
The following are the steps of the triangulation process in the correct order to find the epicenter during earthquakes:
Step 1: Subtract the time of P wave arrival from S wave arrival.
Step 2: See what the time difference is equal to in distance on a seismic wave chart.
Step 3: Draw circles representing the distances from at least three seismograph stations to the epicenter on a map.
Step 4: Find the point where all 3 circles intersect, and you've found the earthquake's epicenter.
Constellations are useful because they can help people to recognize stars in the sky. By looking for patterns, the stars and locations can be much easier to spot.
Answer:
a. hail
c. tornadoes
d. lightning
Explanation:
It is described as a cloud that is masked and dense, with considerable vertical development, in the form of a mountain or huge towers. Part, at least of its top is normally smooth, fibrous or striated, and almost always crushed; This part often extends in the form of an anvil or a vast plume. Below the base, very dark, low clouds appear torn and rainfall or showers.
They are composed of water droplets and ice crystals on top or anvil. In their interior they also contain large raindrops, snowflakes, granulated ice, hail and in cases of extreme instability of large size.
They almost always produce a storm, that is to say, precipitation in the form of showers, of rain or hail, generally, although also of snow in winter, accompanied by gusty winds and electric discharges that occur between clouds or between cloud and earth (lightning) and even tornadoes
