The US Geological Survey registered the two strongest of the quakes at 5.6 magnitude.
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One, on Thursday morning, had a magnitude of 6.2, the US Geological Survey said.
The quake, which the US Geological Survey says had a 6.8 magnitude, reportedly lasted for three minutes.
According to the US Geological Survey, there may be deposits of rare earths in 14 US states.
The US Geological Survey has pegged Marcellus at an estimated recoverable total of 84 trillion cubic feet (TCF).
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Estimates from the US Geological Survey indicated that there could be 60 billion barrels of oil in the region.
The quake, with a magnitude 8.0, struck at 01:12 GMT near the Santa Cruz islands, the US Geological Survey said.
The quake struck 90km (60 miles) south of the country's only nuclear power station in Bushehr, the US Geological Survey (USGS) says.
The US Geological Survey estimates that the Arctic has around a quarter of the world's undiscovered and recoverable oil and gas reserves.
The US Geological Survey estimates that the Bakken field has 6.2bn barrels of recoverable oil, using unconventional methods of fracturing shale oil formations.
Last year, the US Geological Survey estimated the Arctic could be home to 30% of the world's undiscovered natural gas reserves and 13% of its undiscovered oil.
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According to the US Geological Survey, the American Buff-Bellied Pipit is 5.5in (14cm) in length and is usually found in flocks in ploughed fields, shores and tundra.
The " crisis maps" are using data from the US Naval Research Laboratory, the National Hurricane Center, US weather website weather.com and the US Geological Survey.
More extensive sampling of the dust has not found any evidence of thermite or explosives, says a report from the US Geological Survey and another from RJ Lee.
The quake struck at 08:02 local time (00:02 GMT) on Saturday, with the China Earthquake Administration categorising it as a 7.0 magnitude, and the US Geological Survey (USGS) reporting it as 6.6.
In April 2012, a study by scientists at the US Geological Survey of the interior of the US found that events of magnitude 3 or greater had "abruptly increased in 2009" from 1.2 per year in the previous 50 years to more than 25 per year - although a number of gas and oil extraction methods may be implicated in the rise.
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