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AEG Event 6/20/24: Tectonic Implications of NJ Earthquakes

When
20 Jun 2024
6:00 PM - 10:00 PM
Location
60 Cottontail Lane, Somerset, NJ 08873

Registration

Payment
In-Person Registration Fees
$40 for AEG members / $50 non-members / $5 for students with RSVP /
Professors attend as our guests at no charge.
Remote Attendance Registration Fee - $15.00 (no CEC credits)
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Make check payable to AEG.
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We are continuing to celebrate our return to in-person meetings, bring a guest who is new to AEG, and they pay half-price!

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DINNER MEETING ANNOUNCEMENT

Tectonic Implications of the 2024 New Jersey Earthquakes

Thursday, June 20, 2024
At the Clarion Hotel in Somerset, New Jersey

Dr. Gregory C. Herman, Geologist

New Jersey Geological Survey (Retired), Consultant, Trap Rock Industries

April-May 2024 Hunterdon, Morris, and Somerset Counties, New Jersey: 4.8 Magnitude Earthquake (EQ) and Aftershocks

Time:	Social Hour 6:00 pm – 6:45 pm / Dinner 6:45 pm – 7:45 pm Presentation begins at 8:00 pm
Place:	Clarion Hotel / 60 Cottontail Lane, Somerset, NJ 08873 / (732) 560-9880
RSVP:	End of Business, Tuesday, June 18, 2024. A timely RSVP is appreciated! Please note, you can register more than one individual at a time! Don't forget to add the event to your calendar from our website!
Cost:	In-Person Registration Fees $40 for AEG members / $50 non-members / $5 for students with RSVP / Professors attend as our guests at no charge. Remote Attendance Registration Fee - $15.00 (no CEC credits) Guests are always welcome! Pay at the door by check, cash, or credit card. Make check payable to AEG. Important: The payment links will be sent to you after you register. We are continuing to celebrate our return to in-person meetings, bring a guest who is new to AEG, and they pay half-price!
CECs:	One professional development hour (pdh) for continuing education credit (CEC) will be awarded for attending the presentation. SRPLB Approval for One hour of LSRP Technical CEC may be requested.

ABSTRACT

A swarm of light to very minor earthquakes has been occurring since April 5, 2024 within a focused, 60-square mile area of Hunterdon, Morris, and Somerset Counties, NJ. An initial 4.8 magnitude event with an epicenter near Oldwick, NJ has been succeeded by hundreds of aftershocks over a months time. The initial earthquake is the second largest, historical event in New Jersey, although since 1950 there have been over 40 earthquakes in the region within 250 km that exceeded magnitude 3.0.

The structural nature of the strongest events have provided unprecedented insights into the subtle, on-going mountain-building processes currently operating in the region stemming from stresses accompanying the slow, westward drift of the North American tectonic plate. The most probable faults for the two largest earthquakes (4.8 and 3.7 magnitudes) are blind, right-lateral reverse faults striking N8E to N11E degrees that dip moderately eastward at depths ranging between 2 and 10 km below ground surface within Proterozoic basement.

This talk will summarize the geospatial, structural, and temporal aspects of this unusual event swarm and explain how the physical dimensions of the associated faults are estimated. This swarm is compatible with having N-S striking neotectonic crustal arches and troughs running through the region west of the Ramapo seismic zone based on CORS GPS vertical crustal motions and the Sykes and others 2006 earthquake catalog for the Philadelphia and

BIOGRAPHY

Dr. Gregory Charles Herman is one of the more distinguished and prolific Members of the NY-Philadelphia Chapter of AEG, having conducted many memorable field trips and talks over the years. He sent in his Abstract and Bio while on the road in Ontario, “mapping cross-cutting astroblemes along the trans Canadian Highway, where brittle Silurian shear planes and brecciated faults crosscut 1.1 Ga dikes of the mid-continental rift system. Eh!”

Dr. Herman is a PhD structural geologist who has focused on Appalachian geology, tectonics, and bedrock hydrogeology for most of his career. With the advent and rise of GIS and CAD, his focus turned toward the neo tectonic characterization of the North American tectonic plate with respect to the Chicxulub (Ma) and Chesapeake (35.5 Ma) impact craters.

After retiring from a 32-year career at the NJ Geological Survey, he now consults for Trap Rock Industries while independently researching and writing books on geological, geophysical and geo-archaeological phenomenon. He has published and coauthored dozens of papers and two books. His work and publications are now available online at “Impact Tectonics.”

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AEG Event 6/20/24: Tectonic Implications of NJ Earthquakes

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