**Earthquakes and the Modified Mercalli Intensity Scale** When an earthquake strikes, it can cause significant damage to the Earth's surface. This damage is measured using the intensity scale, which is based on the observed effects of the earthquake on people and structures. The Modified Mercalli Intensity Scale (MMI) is the most widely used scale for measuring earthquake intensity. It was developed in 1931 and has become the standard used by the United States. The MMI scale consists of twelve levels, ranging from I (not felt) to XII (catastrophic). The intensity of an earthquake is determined by observing the effects it has on people, structures, and the natural environment. **Intensity Witness perceptions and Damage** * **I:** Not felt by people, except in exceptional circumstances. * **II:** Weakly felt by people at rest as a slight vibration or trembling of the ground. * **III:** Felt quite noticeably by people indoors, especially on upper floors of buildings. * **IV:** Causes vibration like passing of heavy truck; shaking of windows and doors; cracking of plaster. * **V:** Felt outdoors; dishes, windows, doors disturbed; walls make cracking sound. * **VI:** Felt by all, many frightened and run outdoors. * **VII:** Everybody runs outdoors. * **VIII:** Damage slight in specially designed structures; considerable damage in ordinary substantial buildings with partial collapse. * **IX:** Buildings shifted off foundations with frames racked. * **X:** Some well-built wooden structures destroyed; most masonry and frame structures destroyed with their foundations; ground badly cracked. * **XI:** Rails bent slightly. * **XII:** Rails bent greatly. The MMI scale is used to provide a quick and easy way to assess the severity of an earthquake. It is important to note that the intensity of an earthquake can vary depending on the location of the epicenter, the depth of the earthquake, and the local geology.
WEB A pair of earthquakes with magnitudes of 42 and 44 shook Northern California the US The first and smaller quake was 33 miles deep. WEB The largest earthquake in California United States 30 in Cobb California United States 32 in Aguanga California United States. WEB RIO DELL Calif Dec 20 Reuters - A powerful magnitude 64 earthquake jolted the extreme northern coast of California before dawn on. WEB Recent Earthquakes in California and Nevada Click on an earthquake on the above map for a zoomed-in view. Water boil advisories issued in hard-hit areas of Northern California Some cities in Northern California are..
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**Earthquakes and the Modified Mercalli Intensity Scale** When an earthquake strikes, it can cause significant damage to the Earth's surface. This damage is measured using the intensity scale, which is based on the observed effects of the earthquake on people and structures. The Modified Mercalli Intensity Scale (MMI) is the most widely used scale for measuring earthquake intensity. It was developed in 1931 and has become the standard used by the United States. The MMI scale consists of twelve levels, ranging from I (not felt) to XII (catastrophic). The intensity of an earthquake is determined by observing the effects it has on people, structures, and the natural environment. **Intensity Witness perceptions and Damage** * **I:** Not felt by people, except in exceptional circumstances. * **II:** Weakly felt by people at rest as a slight vibration or trembling of the ground. * **III:** Felt quite noticeably by people indoors, especially on upper floors of buildings. * **IV:** Causes vibration like passing of heavy truck; shaking of windows and doors; cracking of plaster. * **V:** Felt outdoors; dishes, windows, doors disturbed; walls make cracking sound. * **VI:** Felt by all, many frightened and run outdoors. * **VII:** Everybody runs outdoors. * **VIII:** Damage slight in specially designed structures; considerable damage in ordinary substantial buildings with partial collapse. * **IX:** Buildings shifted off foundations with frames racked. * **X:** Some well-built wooden structures destroyed; most masonry and frame structures destroyed with their foundations; ground badly cracked. * **XI:** Rails bent slightly. * **XII:** Rails bent greatly. The MMI scale is used to provide a quick and easy way to assess the severity of an earthquake. It is important to note that the intensity of an earthquake can vary depending on the location of the epicenter, the depth of the earthquake, and the local geology.
**Strong 6.1 Earthquake Strikes Near Wellington** **Wellington, New Zealand - February 17, 2023** A strong earthquake with a magnitude of 6.1 struck off the coast of Wellington, New Zealand, early this morning. The quake hit at 2:27 am local time at a depth of 16 kilometers. According to the GeoNet, the earthquake was one of the strongest to hit the region in recent history. The quake was felt across much of the lower North Island, including Wellington, Porirua, and Kapiti Coast. Reports of damage are still coming in, but no major injuries or casualties have been reported at this time. Several buildings in Wellington have been evacuated as a precaution. Aftershocks are expected to continue for several days. Residents are advised to be prepared for further shaking. The earthquake is a reminder of New Zealand's vulnerability to seismic activity. The country lies on the Pacific Ring of Fire, which is one of the most seismically active regions in the world. Residents are encouraged to have an emergency plan in place and to be aware of the risks associated with earthquakes. More information and resources are available from the Ministry of Civil Defence and Emergency Management (MCDEM) at www.getready.govt.nz.
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WEB An aftershock of 40-magnitude hit later in the day An earthquake struck the East Coast of. Earthquakes Death Toll Jumps to Over 4300 in Turkey and Syria. WEB Earthquake in Turkey and Syria Quake Death Toll Passes 15000 in Turkey and Syria as Desperation. Our live coverage of the major earthquake in Turkey and. February 13 2023 Over 36000 dead from quake in Turkey and. WEB Thousands killed in major earthquakes in Turkey and Syria as it happened. WEB More than 4300 people have died and rescuers are racing to pull survivors from beneath the rubble after. WEB A powerful new earthquake struck southern Turkey and northwestern Syria on Monday evening trapping..
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