Instruct: Given a question, retrieve relevant documents that answer the question.
Query: What was the magnitude of the last earthquake to hit the East Coast?
The USGS found that the farthest landslide from the 2011 Virginia earthquake was from the epicenter. This is by far the greatest landslide distance recorded from any other earthquake of similar magnitude. Previous studies of worldwide earthquakes indicated that landslides occurred no farther than from the epicenter of a magnitude 5.8 earthquake. The study suggested that the added information about East Coast earthquakes may prompt a revision of equations that predict ground shaking. "What makes this new study so unique is that it provides direct observational evidence from the largest earthquake to occur in more than 100 years in the eastern U.S. Now that we know more about the power of East Coast earthquakes, equations that predict ground shaking might need to be revised."
The preliminary analysis of the pattern of seismic-waves radiating from December 26, 2003 earthquake was consistent with the earthquake having been caused by right-lateral strike-slip motion on a north-south oriented fault. The earthquake occurred in a region within which major north-south, right-lateral, strike-slip faults had been previously mapped, and the epicenter is near the previously mapped, north-south oriented Bam Fault. However, field investigations will be necessary to find if the earthquake occurred on the Bam Fault or on another. The Bam earthquake is south of the destructive earthquakes of June 11, 1981 (magnitude 6.6, approximately 3,000 deaths) and July 28, 1981 (magnitude 7.3, approximately 1,500 deaths). These earthquakes were caused by a combination of reverse-motion and strike-slip motion on the north-south oriented Gowk fault.
In North Carolina, the hurricane produced winds of up to in Manteo. Described as one of the worst hurricanes in record in Hatteras, the storm resulted in $25,000 in damage (1936 USD, $360,000 2006 USD) to roads and bridges and $30,000 in damage (1936 USD, $440,000 2006 USD) to buildings and piers. Very high tides were reported along the Outer Banks, with Nags Head losing about of beach. The hurricane destroyed the highway bridge along the Currituck Sound, and resulted in heavy crop damage in northeastern North Carolina. The hurricane was also considered among the worst hurricanes on record in the Norfolk, Virginia, area. Winds of up to at Cape Henry destroyed windows, roofs, and some entire buildings, resulting in around $500,000 in damage (1936 USD, $7.3 million 2006 USD). The hurricane produced a storm tide of in Sewell's Point, Virginia, the second highest on record at that location. Two locations along the James River experienced record crest levels of over . Rough seas washed several boats ashore, and shipping was cancelled in and out of Norfolk. The hurricane resulted in cancelled train service and increased traffic. The hurricane was indirectly responsible for two casualties. The first fatality occurred when debris from the hurricane struck a person in the head and later died. Another person drowned in the Elizabeth River in an effort to recover a rowboat blown adrift. Though hurricane warnings were posted for the northeast United States and hurricane-force winds occurred there, damage, if any, is unknown.
The tropical cyclones of the season produced a total of 88 fatalities and $38.5 million in property damage (1950 USD). The first officially named Atlantic hurricane was Hurricane Able, which formed on August 12, brushed the North Carolina coastline, and later moved across Atlantic Canada. The strongest hurricane of the season, Hurricane Dog, reached the equivalent of a Category 4 hurricane on the Saffir–Simpson scale, and caused extensive damage to the Leeward Islands. Two major hurricanes affected Florida: Easy produced the highest 24-hour rainfall total recorded in the United States, while King struck downtown Miami as a Category 4 hurricane and caused $27.75 million (1950 USD) of damage. The two major landfalls made the 1945–1950 period the only five-year period to feature five major hurricane landfalls in the United States—a record that held until tied in 2000–2005. The last storm of the year, an unnamed tropical storm, dissipated on November 13.
The earthquake caused all of Mexico City to tremble, prompting people to evacuate after the early warning system was triggered. It also generated a tsunami with waves of above tide level; and tsunami alerts were issued for surrounding areas. Mexico's president called it the strongest earthquake recorded in the country, in a century. It was also the second strongest recorded in the country's history, behind the magnitude 8.6 earthquake in 1787, and the largest recorded globally in 2017.
Parts of New London, Hartford, New Haven, Litchfield, and Fairfield counties, from Greenwich to Danbury and Bridgeport, were affected, although most of the state had power all evening, aside from a few momentary interruptions that caused computers to reboot. Metro-North trains stopped and remained on the tracks for hours, until they could be towed to the nearest station. Generally, most of the state east of Interstate 91, and some places west of I-91, had power during the duration of the blackout, with some of New Haven's eastern suburbs being seen as the easternmost extreme of the effects of the blackout.
The 1960 Valdivia earthquake () or Great Chilean earthquake ("Gran terremoto de Chile") of 22 May is the most powerful earthquake ever recorded. Various studies have placed it at 9.4–9.6 on the moment magnitude scale. It occurred in the afternoon (19:11 GMT, 15:11 local time), and lasted approximately 10 minutes. The resulting tsunami affected southern Chile, Hawaii, Japan, the Philippines, eastern New Zealand, southeast Australia and the Aleutian Islands.
The Great Galveston Hurricane, known regionally as the Great Storm of 1900, was the deadliest natural disaster in United States history, one of the deadliest hurricanes (or remnants) to affect Canada, and the fourth-deadliest Atlantic hurricane overall. The hurricane left between 6,000 and 12,000 fatalities in the United States; the number most cited in official reports is 8,000. Most of these deaths occurred in the vicinity of Galveston after storm surge inundated the entire island with of water. In addition to the number killed, every house in the city sustained damage, with at least 3,636 destroyed. Approximately 10,000 people in the city were left homeless, out of a total population of nearly 38,000. The disaster ended the Golden Era of Galveston, as the hurricane alarmed potential investors, who turned to Houston instead. The Gulf of Mexico shoreline of Galveston island was subsequently raised by and a seawall erected.
On 28 December 1908 a strong earthquake of magnitude of 7.1 and a maximum Mercalli intensity of XI, hits Sicily and Calabria. About ten minutes after the earthquake, the sea on both sides of the Strait suddenly withdrew a 12-meter (39-foot) tsunami swept in, and three waves struck nearby coasts. It impacted hardest along the Calabrian coast and inundated Reggio Calabria after the sea had receded 70 meters from the shore. The entire Reggio seafront was destroyed and numbers of people who had gathered there perished. Nearby Villa San Giovanni was also badly hit. Along the coast between Lazzaro and Pellaro, houses and a railway bridge were washed away. The cities of Messina and Reggio Calabria were almost completely destroyed and between 75,000 and 200,000 lives were lost.
On August 14, the Northeast blackout of 2003, a wide-area power failure in the northeastern US and central Canada, affected over 55 million people.
Hurricane Andrew was a destructive Category 5 Atlantic hurricane that struck the Bahamas, Florida, and Louisiana in mid-to-late August 1992, the most destructive hurricane to ever hit Florida until Hurricane Irma surpassed it 25 years later. It was the strongest in decades and the costliest hurricane to make landfall anywhere in the United States until it was surpassed by Katrina in 2005. Andrew caused major damage in the Bahamas and Louisiana, but the greatest impact was felt in South Florida, where the storm made landfall as a Category 5 hurricane, with sustained wind speeds as high as 165 mph (270 km/h). Passing directly through the city of Homestead in Dade County (now known as Miami-Dade County), Andrew stripped many homes of all but their concrete foundations. In total, Andrew destroyed more than 63,500 houses, damaged more than 124,000 others, caused $27.3 billion in damage, and left 65 people dead.
In 1863 "Great Eastern" made three voyages to New York, with 2,700 passengers being carried out and 970 back to Britain along with a large tonnage of cargo. One of her paddle wheels was damaged on the last outward trip and she completed it using her screw, while on the return journey she ran down and damaged "Jane", a small sailing ship. The company lost nearly £20,000 on the voyages due to a price war between the Cunard and Inman shipping lines, and ended up with debts of more than £142,000, which forced them to lay up "Great Eastern".
Strong winds from the hurricane significantly affected four counties in the state, which damaged or destroyed over 730,000 houses and buildings, while leaving more than 1 million without power. The storm surge impacted portions of Miami-Dade County, peaking at around 16.9 feet (5.2 m) just north of Homestead near the Burger King International Headquarters; the surge caused significant damage to boats and to the Charles Deering Estate. The nationwide maximum rainfall total from the hurricane was 13.98 inches (355 mm) in the western portion of Miami-Dade County. No major flooding was reported in the state. The hurricane caused about $25.3 billion (1992 USD) in damage and 44 deaths in the state—15 directly from the storm's effects and 29 indirectly related. Many other sources, however, estimated that Andrew caused more than $32 billion in damage in the state. Andrew was, at the time, the costliest hurricane in the history of the United States; it was surpassed in subsequent years by Hurricane Katrina in 2005, Hurricane Ike in 2008, Hurricane Sandy in 2012, and hurricanes Harvey, Irma, and Maria in 2017.
The 1983 Sea of Japan earthquake or 1983 Nihonkai-Chubu earthquake occurred on May 26, 1983 at 11:59:57 local time (02:59:57 UTC). It had a magnitude of 7.8 on the moment magnitude scale. It occurred in the Sea of Japan, about 100 km west of the coast of Noshiro in Akita Prefecture, Japan. Out of the 104 fatalities, all but four were killed by the resulting tsunami, which struck communities along the coast, especially Aomori and Akita Prefectures and the east coast of Noto Peninsula. Images of the tsunami hitting the fishing harbor of Wajima on Noto Peninsula was broadcast on TV. The waves exceeded in some areas. Three of the fatalities were along the east coast of South Korea (whether North Korea was affected is not known). The tsunami also hit Okushiri Island, the site of a more deadly tsunami 10 years later.
New Orleans was catastrophically affected by what Raymond B. Seed called "the worst engineering disaster in the world since Chernobyl", when the Federal levee system failed during Hurricane Katrina in 2005. By the time the hurricane approached the city at the end of August 2005, most residents had evacuated. As the hurricane passed through the Gulf Coast region, the city's federal flood protection system failed, resulting in the worst civil engineering disaster in American history. Floodwalls and levees constructed by the United States Army Corps of Engineers failed below design specifications and 80% of the city flooded. Tens of thousands of residents who had remained were rescued or otherwise made their way to shelters of last resort at the Louisiana Superdome or the New Orleans Morial Convention Center. More than 1,500 people were recorded as having died in Louisiana, most in New Orleans, while others remain unaccounted for. Before Hurricane Katrina, the city called for the first mandatory evacuation in its history, to be followed by another mandatory evacuation three years later with Hurricane Gustav.
The first earthquake hit at 21:17 hours local time on April 24, 1957 and lasted 25 seconds having a magnitude of 7.1 on the moment magnitude scale; a stronger second quake occurred at 04:26 hours on April 25; this one lasted for 60 seconds and had a magnitude of 7.3. The earthquakes also shook many locations around Fethye, the epicenter, including Isparta, Burdur, Tefenni, Acıpayam, Denizli, Nazilli, Aydın, Yatağan, Milas, Bodrum, Ödemiş, Muğla, Marmaris, Köyceğiz, Kaş and Finike as well as the Greek islands of Kos, Symi and Rhodes.
The 1802 Vrancea earthquake occurred in the Vrancea Mountains of today's Romania (then Moldavia) on , on St. Paraskeva's Day. With an estimated intensity of 7.9 on the moment magnitude scale, it is the strongest earthquake ever recorded in Romania and one of the strongest in European history. It was felt across an area of more than two million square kilometers in Eastern Europe and the Balkans, from Saint Petersburg to the Aegean Sea.
Since 1850, only seven tropical cyclones have brought gale-force winds to the Southwestern United States. They are: The 1858 San Diego hurricane that was reconstructed as just missing landfall in 1858, the 1939 Long Beach tropical storm that made landfall near San Pedro in 1939, the remnants of Tropical Storm Jennifer-Katherine in 1963, the remnants of Hurricane Emily in 1965, the remnants of Hurricane Joanne in 1972, the remnants of Hurricane Kathleen in 1976, and Hurricane Nora in 1997, after it was downgraded to a tropical storm.
A 5.2 earthquake struck Gippsland near Moe at 8.55 pm on 19 June 2012, at a shallow depth of 10.0 km. It was the strongest recorded in Victoria in at least three decades, with some sources suggesting it was the strongest in over a century. It was felt across much of Victoria and parts of New South Wales, with strong shaking reported across the state capital, Melbourne. Some minor building damage was reported in the Latrobe Valley close to the epicentre, and in the eastern suburbs of Melbourne. Around 30 requests for help were made to the SES, mainly due to cracked walls and ceilings, and a number of local businesses lost some stock. Approximately 60 aftershocks were recorded the following day, but most of these were not felt.
At the Delaware Breakwater East End Lighthouse in Lewes, strong waves destroyed the lower deck of the lighthouse, while powerful winds blew out the watchroom window. A group of eight volunteers quickly repaired the damage. Moderate wind gusts knocked down numerous trees, tree limbs, and power lines, causing widespread power outages in the state. Conectiv Energy reported the power outage associated with the hurricane as one of the worst in its history. At least 15,300 were left without power during the worst of the hurricane, including 2,500 in the capital city of Dover. Due to the power outages, only one traffic light north of the city of Wilmington was operational. The strong winds also resulted in the Delaware River and Bay Authority to reduce the speed limit on the Delaware Memorial Bridge to 40 mph (65 km/h). 62 roads throughout the state were initially closed due to flooding, downed trees, or downed power lines. Eight roads, including U.S. Route 13A remained closed for several days, primarily due to flooding. Flooding affected the cities of Seaford, Blades, Bayview, and Augustine Beach, with residents in the latter two being forced to evacuate due to severe flooding conditions. Several state parks reported downed trees and damage. Damage in the state totaled $40 million (2003 USD, $44 million 2006 USD), and there were no deaths in the state as a result of the storm.
ACE measures a combination of both the strength and duration of a tropical cyclone, so longer-lasting storms may accumulate more ACE than stronger storms with shorter durations. This discrepancy is most obvious in the comparatively high ACE value of Hurricane Emily to Hurricanes Katrina and Rita: Emily was not as strong as either storm, but formed out in the Atlantic and made a long track across the Caribbean Sea before making landfall. Katrina and Rita, however, both developed in the Bahamas, close to the U.S. mainland, and lasted for much shorter periods of time. In addition, Ophelia and Epsilon are high for their intensity because they maintained themselves for a long period of time and were slow to build and dissipate, as neither was ever more intense than a Category 1 storm.
Since 1900, the only earthquakes recorded with a greater magnitude were the 1960 Great Chilean earthquake (Magnitude 9.5) and the 1964 Good Friday earthquake in Prince William Sound (Magnitude 9.2). The only other recorded earthquakes of magnitude 9.0 or greater were off Kamchatka, Russia, on 4 November 1952 (magnitude 9.0) and Tōhoku, Japan (magnitude 9.1) in March 2011. Each of these megathrust earthquakes also spawned tsunamis in the Pacific Ocean. However, in comparison to the 2004 Indian Ocean earthquake, the death toll from these earthquakes was significantly lower, primarily because of the lower population density along the coasts near affected areas, the much greater distances to more populated coasts, and the superior infrastructure and warning systems in MEDCs (More Economically Developed Countries) such as Japan.
The 2014 Guerrero earthquake occurred with a moment magnitude of 7.2 that hit the state of Guerrero, close to Acapulco, Mexico, on 18 April at 14:27:26. The epicenter occurred 265 kilometers southwest of Mexico City and at a depth of 24 kilometers. Thrust motion at shallow depths is what caused the earthquake. This was broadly consistent with a slip on or near the Guerrero Seismic Gap, a boundary between the Cocos and North American plates along the Pacific Coast approximately 200 kilometers long. The shaking was felt in states as far away as Puebla and Tlaxcala.
The 2008 Iceland earthquake was a doublet earthquake that struck on May 29 at 15:46 UTC in southwestern Iceland. The recorded magnitudes of the two main quakes were 5.9 and 5.8 , respectively, giving a composite magnitude of 6.1. There were no human fatalities, but 30 injuries were reported and a number of sheep were killed. The epicenter of the earthquake was between the towns of Hveragerði and Selfoss, about east-southeast of the capital, Reykjavík. It was the strongest earthquake to hit Iceland since the summer of 2000.
The 1999 quake was the most devastating and costly natural disaster to hit the country in nearly 20 years. The last major earthquake to hit Athens took place on February 24, 1981, near the Alkyonides Islands of the Corinthian Gulf, some 87 km to the west of the Greek capital. Registering a moment magnitude of 6.7, the 1981 earthquake had resulted in the deaths of 20 people and considerable and widespread structural damage in the city of Corinth, nearby towns and sections of Athens' western suburbs.