A baby dolphin is born tail-first to prevent drowning. (Public domain. ;��q�����0�]�=�bf�(pd_�Q��\a��2�npx����i�ʎ�5��W�ɳ=�0�bN(��&'�.�Q�ך�5���F�آ�~�!�a=&�^W �M��:8�9f�3��P����d�
�q�a=}7��ꙣ�Y}���5����2�qWE�;� ]f����0��Wކנ|�]+�jH7v5�O�vTGX`����R�B��%ѣ��Q�&��>h.�:q�9�7�������2,Ǿ��kμ�oc�z�Z��Up���z�L��5�`F�� Wd:��y��K��N�K^�3y�)W�������z About Latest Earthquakes Version Info Clicking the list icon in the top right corner will load the earthquake list. The location where all the circles intersect is the location of the earthquake epicenter. �
... 11. The P waves travel faster and shake the ground where you are first. %PDF-1.5
If weather does affect earthquake occurrence, or if some animals or people can tell when an earthquake is coming, we do not yet understand how it works.Triangulation can be used to locate an earthquake. We call these puzzle pieces The tectonic plates divide the Earth's crust into distinct "plates" that are always slowly moving. g[�T�y�~\�P���2���Ն�/k���| On any particular fault, scientists know there will be another earthquake sometime in the future, but they have no way of telling when it will happen.These are two questions that do not yet have definite answers. )A simplified cartoon of the crust (brown), mantle (orange), and core (liquid in light gray, solid in dark gray) of the earth. (Public domain.) (Public domain. On March 11, 2011, Japan experienced the strongest earthquake in its recorded history. The seismometers are shown as green dots. This idea was established because 2 of the biggest earthquakes occurred in the month of March. Ready to officially become a DoSomething member? )But this skin is not all in one piece – it is made up of many pieces like a puzzle covering the surface of the earth. Earthquakes are concentrated along these plate boundaries. endobj
The earthquake struck below the North Pacific Ocean, 130 kilometers (81 miles) east of Sendai, the largest city in the Tohoku region, a northern part of the island of Honshu. 4 0 obj
The size of an earthquake depends on the size of the fault and the amount of slip on the fault, but that’s not something scientists can simply measure with a measuring tape since faults are many kilometers deep beneath the earth’s surface. (Public domain.
Click on a pin on the map to see more information. Scientists have tried many different ways of predicting earthquakes, but none have been successful. The calculated distance from each seismometer to the earthquake is shown as a circle. Even though seismic equipment is used to predict a trembler, it still can't prevent the mass destruction that results from the natural event. Then the S waves follow and shake the ground also. How do scientists measure the size of earthquakes? )The size of an earthquake depends on the size of the fault and the amount of slip on the fault, but that’s not something scientists can simply measure with a measuring tape since faults are many kilometers deep beneath the earth’s surface. When the force of the moving blocks finally overcomes the The cartoon sketch of the seismograph shows how the insrument shakes with the earth below it, but the recording device remains stationary (instead of the other way around). 15 Fascinating Facts about Earthquakes. endobj
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If you are close to the earthquake, the P and S wave will come one right after the other, but if you are far away, there will be more time between the two.P Waves alternately compress and stretch the crustal material parallel to the direction they are propagating. )While the edges of faults are stuck together, and the rest of the block is moving, the energy that would normally cause the blocks to slide past one another is being stored up. How do scientists measure the size of earthquakes? If it happens to be medicine to stay alive, then take it. About 100,000 of those can be felt, and 100 or so cause damage each year. No data point selected. )By looking at the amount of time between the P and S wave on a seismogram recorded on a seismograph, scientists can tell how far away the earthquake was from that location.