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Can you feel a 3 earthquake?

Earthquakes that fall between 3.0 to 3.9 on the scale are considered minor. We can feel the earthquake, and objects inside are going to shake around, but there very rarely is damage. Recorded by seismographs but not felt by people.

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Just how strong was Wednesday’s earthquake anyhow?

The quake that struck about 11 miles south southwest of Mifflintown in Juniata County measured 3.4 on the Richter scale, with weak-to-light shaking being reported throughout central Pa. and as far south as Chambersburg and the Maryland border. Earthquakes that fall between 3.0 to 3.9 on the scale are considered minor. We can feel the earthquake, and objects inside are going to shake around, but there very rarely is damage.

Here is the full scale:

Magnitude Description Effect 1.0-1.9 Micro Recorded by seismographs but not felt by people. 2.0-2.9 Minor Felt slightly by some. No building damage. 3.0-3.9 Minor Often felt by people, but rarely causes any damage. You can see objects shaking. 4.0-4.9 Light Noticeable shaking of objects, and people can usually feel it. Only minimal damage caused. 5.0-5.9 Moderate Can damage poorly constructed buildings. Everyone can feel this. 6.0-6.9 Strong Can damage a number of well-constructed buildings, but earthquake-resistant buildings will only have slight or moderate damage. It can be felt up to several hundred miles from the epicenter. 7.0-7.9 Major Damages most buildings, most in poor shape will at least partially collapse. 8.0-8.9 Great Major damage to buildings with lots of destruction. Will cause moderate-to-heavy damage to earthquake-resistant buildings. Can be felt throughout extremely large regions. 9.0 and greater Great Near or total destruction of all buildings. Permanent change to ground topography. Can be felt in very distant locations.

We have had several earthquakes larger than this shake the state before:

September 25, 1998: A 4.5 earthquake hit West Fallowfield Township in Crawford County. January 16, 1994: Two earthquakes shook the state, one measuring 4.2 on the Richter scale and the other measuring 4.6. The epicenters were in Spring Township for the 4.2 earthquake and Lower Heidelberg Township for the 4.6 earthquake, both in Berks County.

April 23, 1984: A 4.2 earthquake struck south of Lancaster, in Conestoga.

March 11, 1980: A 3.7 earthquake hit the greater Philadelphia area, six days after a 3.5 quake shook the area.

May 12, 1964: A 4.5 earthquake hit Lebanon.

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Do 10.0 earthquakes happen?

No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs.

No, earthquakes of magnitude 10 or larger cannot happen. The magnitude of an earthquake is related to the length of the fault on which it occurs. That is, the longer the fault, the larger the earthquake. A fault is a break in the rocks that make up the Earth's crust, along which rocks on either side have moved past each other. No fault long enough to generate a magnitude 10 earthquake is known to exist, and if it did, it would extend around most of the planet. The largest earthquake ever recorded was a magnitude 9.5 on May 22, 1960 in Chile on a fault that is almost 1,000 miles long…a “megaquake” in its own right.

Learn more: Earthquake Magnitude, Energy Release, and Shaking Intensity

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