Question: In September 2011, what was the magnitude of the earthquake in the city where Andre Bloc lived when he died?

full_context: Document 1: Jules Bloch: BULLET::::- Colette Caillat, "Recueil d'articles de Jules Bloch, 1906-1955", ("Collection of Articles by Jules Bloch, 1906-1955"), texts gathered by Colette Caillat, Collège de France, Institut de civilisation indienne; Published by E. de Boccard, Paris, 1985, .
Document 2: Le Moniteur des travaux publics et du bâtiment: Le Moniteur des travaux publics et du bâtiment ("Monitor of public works and buildings", ) is a French weekly magazine covering construction systems and architecture. Founded in 1903 by Louis Dubois and a publishing house, it now belongs to Infopro Digital, a company owned by TowerBrook Capital Partners. The magazine's headquarters are in Paris.
Document 3: April 2015 Nepal earthquake: Thousands of houses were destroyed across many districts of the country, with entire villages flattened, especially those near the epicenter.
Document 4: New Delhi: With a total area of 42.7 km2 (16.5 sq mi), New Delhi forms a small part of the Delhi metropolitan area. Because the city is located on the Indo-Gangetic Plain, there is little difference in elevation across the city. New Delhi and surrounding areas were once a part of the Aravalli Range; all that is left of those mountains is the Delhi Ridge, which is also called the Lungs of Delhi. While New Delhi lies on the floodplains of the Yamuna River, it is essentially a landlocked city. East of the river is the urban area of Shahdara. New Delhi falls under the seismic zone-IV, making it vulnerable to earthquakes.
Document 5: André Berge: André Berge (24 May 1902 – 27 October 1995) was a French physician and psychoanalyst. He was born on 24 May 1902 in the 16th Arrondissement of Paris and died on the 27 October 1995 in Paris and he was a doctor, psychoanalyst and ‘Man of Letters’.
Document 6: André Bloc: André Bloc (Algiers, May 23, 1896 – New Delhi, November 8, 1966) was a French sculptor, magazine editor, and founder of several specialist journals. He founded the "Groupe Espace" in 1949.
Document 7: New Delhi: New Delhi lies on several fault lines and thus experiences frequent earthquakes, most of them of mild intensity. There has, however, been a spike in the number of earthquakes in the last six years, most notable being a 5.4 magnitude earthquake in 2015 with its epicentre in Nepal, a 4.7-magnitude earthquake on 25 November 2007, a 4.2-magnitude earthquake on 7 September 2011, a 5.2-magnitude earthquake on 5 March 2012, and a swarm of twelve earthquakes, including four of magnitudes 2.5, 2.8, 3.1, and 3.3, on 12 November 2013.
Document 8: Seattle: Due to its location in the Pacific Ring of Fire, Seattle is in a major earthquake zone. On February 28, 2001, the magnitude 6.8 Nisqually earthquake did significant architectural damage, especially in the Pioneer Square area (built on reclaimed land, as are the Industrial District and part of the city center), but caused only one fatality. Other strong quakes occurred on January 26, 1700 (estimated at 9 magnitude), December 14, 1872 (7.3 or 7.4), April 13, 1949 (7.1), and April 29, 1965 (6.5). The 1965 quake caused three deaths in Seattle directly, and one more by heart failure. Although the Seattle Fault passes just south of the city center, neither it nor the Cascadia subduction zone has caused an earthquake since the city's founding. The Cascadia subduction zone poses the threat of an earthquake of magnitude 9.0 or greater, capable of seriously damaging the city and collapsing many buildings, especially in zones built on fill.
Document 9: Jaap Blokker: Blokker was born in Amsterdam. From 1976 to 2010 he was general director of Blokker Holding, which operates a series of chain stores in various countries, the most well known in the Netherlands is Blokker. He was also an outspoken critic of the euro and the effects of immigration and published his criticism in the Blokker Holding annual reports.
Document 10: Southern California: Many faults are able to produce a magnitude 6.7+ earthquake, such as the San Andreas Fault, which can produce a magnitude 8.0 event. Other faults include the San Jacinto Fault, the Puente Hills Fault, and the Elsinore Fault Zone. The USGS has released a California Earthquake forecast which models Earthquake occurrence in California.
Document 11: Houston: The Houston area has over 150 active faults (estimated to be 300 active faults) with an aggregate length of up to 310 miles (500 km), including the Long Point–Eureka Heights fault system which runs through the center of the city. There have been no significant historically recorded earthquakes in Houston, but researchers do not discount the possibility of such quakes having occurred in the deeper past, nor occurring in the future. Land in some areas southeast of Houston is sinking because water has been pumped out of the ground for many years. It may be associated with slip along the faults; however, the slippage is slow and not considered an earthquake, where stationary faults must slip suddenly enough to create seismic waves. These faults also tend to move at a smooth rate in what is termed "fault creep", which further reduces the risk of an earthquake.
Document 12: Éric Losfeld: Éric Losfeld (Mouscron, 1922 - Paris, 1979) was a Belgian-born French publisher who had a reputation for publishing controversial material with his publishing imprint Éditions Le Terrain Vague.
Document 13: L'Express: "L'Express" was co-founded in 1953 by Jean-Jacques Servan-Schreiber, future president of the Radical Party, and Françoise Giroud, who had earlier edited "ELLE" and went on to become France's first minister of women's affairs in 1974 and minister of culture in 1976. When founded during the First Indochina War, it was modelled on the US magazine "Time" and the German magazine "Der Spiegel". "L'Express" is published weekly.
Document 14: 2008 Sichuan earthquake: According to a study by the China Earthquake Administration (CEA), the earthquake occurred along the Longmenshan fault, a thrust structure along the border of the Indo-Australian Plate and Eurasian Plate. Seismic activities concentrated on its mid-fracture (known as Yingxiu-Beichuan fracture). The rupture lasted close to 120 sec, with the majority of energy released in the first 80 sec. Starting from Wenchuan, the rupture propagated at an average speed of 3.1 kilometers per second 49° toward north east, rupturing a total of about 300 km. Maximum displacement amounted to 9 meters. The focus was deeper than 10 km.
Document 15: Istanbul: Istanbul is near the North Anatolian Fault, close to the boundary between the African and Eurasian Plates. This fault zone, which runs from northern Anatolia to the Sea of Marmara, has been responsible for several deadly earthquakes throughout the city's history. Among the most devastating of these seismic events was the 1509 earthquake, which caused a tsunami that broke over the walls of the city and killed more than 10,000 people. More recently, in 1999, an earthquake with its epicenter in nearby İzmit left 18,000 people dead, including 1,000 people in Istanbul's suburbs. The people of Istanbul remain concerned that an even more catastrophic seismic event may be in the city's near future, as thousands of structures recently built to accommodate Istanbul's rapidly increasing population may not have been constructed properly. Seismologists say the risk of a 7.6-magnitude or greater earthquake striking Istanbul by 2030 is more than 60 percent.
ground_truth: 4.2-magnitude
sub_queries: Where did André Bloc live when he died? Answer: New Delhi
What was the magnitude of the earthquake that affected New Delhi on September 2011? Answer: 4.2-magnitude