POTSDAM -- SUNY Potsdam Geology Professor Emeritus Frank Revetta offers two free educational series again this fall, including his popular planetarium shows and a series of geophysics and seismology workshops, beginning Wednesday.

All are welcome to attend these free educational events.

Planetarium shows are held every Thursday afternoon at 4 p.m. in the college’s planetarium in the basement of Stowell Hall. Each show lasts about 45 minutes, and guests of all ages are welcome.

Attendees are encouraged to arrive early, because once the show begins, the door is locked. Please note that no food or drink are allowed in the planetarium and, as darkness is required, cell phones cannot be used during the show. Free parking is available in Lot 6, near Kellas Hall.

The fall planetarium show schedule is as follows:

• Sept. 3: “Circumpolar Constellations”

• Sept. 10: “North Star or Polaris”

• Sept. 17: “Brightest Stars”

• Sept. 24: “Winter Constellations”

• Oct. 1: “Spring & Summer Constellations”

• Oct. 8: “Worldwide Constellations”

• Oct. 15: “How Astronomers Locate Stars & Planets”

• Oct. 22: “The Sun’s Path”

• Oct. 29: “The Seasons”

• Nov. 5: “The Constellations of the Zodiac”

• Nov. 12: “Motions in the Heavens”

• Nov. 19: “Precession of Equinox”

• Dec. 3: “Solar System”

• Dec. 10: “The History of Astronomy”

The geophysics and seismology workshops will be held every Tuesday at 4 p.m. in Timerman Hall Room B23, the Revetta-NYPA laboratory. The workshops will consist of a series of exercises, videos and experiments in geophysics and seismology.

Attendees will learn how a seismograph works, how to interpret seismograms of both local and distant earthquakes, and learn how to use a gravity meter and magnetometer, as well as seismic and electrical resistivity equipment.

The fall seismology workshop schedule is as follows:

• Sept. 8: “How are Earthquakes Detected?”

• Sept. 15: “Where do Earthquakes Occur?”

• Sept. 22: “Seismic Waves and the Earth’s Interior”

• Sept. 29: “Loma Prieta Earthquake”

• Oct. 6: “Seismogram Interpretation: Loma Prieta Quake”

• Oct. 20: “Northridge Earthquake”

• Oct. 27: “Seismogram Interpretation: Northridge Quake”

• Nov. 3: “Tsunamis”

• Nov. 10: “Local Earthquakes: Video”

• Nov. 17: “Local Earthquakes: Exercise”

• Dec. 1: “Gravity and Magnetic Surveying”

• Dec. 8: “Resistivity and Seismic Surveying”

For more information contact Frank Revetta at 267-3441 or revettfa@potsdam.edu, or Roberta Greene at 267-2286 or greenera@potsdam.edu.