A magnitude 4.7 natural disaster hit western Iran on Wednesday evening, according to Mizan, the official website of the Iranian judiciary.
Baldwin, speaking from Golden, Colorado, said that "it's ongoing activity there".
Seven had a preliminary magnitude of at least 5, while the eighth natural disaster was a magnitude 4.
People in Kermanshah and Soomar cities rushed to the streets in panic as the temblors hit, local media reported.
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On November 12, a 7.3-magnitude quake killed 620 people in Kermanshah and eight in Iraq.
There were no immediate reports of injuries or damage.
All the earthquakes struck at a depth of 10km, according to the USGS.
Earlier on Thursday, the USGS said a magnitude 4.9 quake hit Iran's southern province of Kerman before dawn, while another 4.6 magnitude temblor struck on Wednesday night in Kermanshah province.
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Kerman has also recently seen several quakes, ranging in magnitude from 4 to 6.2.
Iran is located on major seismic faults and experiences nearly a quake per day on average.
In November past year, a massive natural disaster of magnitude 7.3 struck areas near Iran-Iraq border.
In 2003, a magnitude 6.6 quake in the province of Kerman flattened the historic city of Bam, killing more than 26,000 people.
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