There are several different categories of seismic data being collected around the Montgomery County / Loudoun County area, and most people only know about the earthquake-monitoring portion.
A kempt, curated growing series deeply exploring the already numerous and not yet fully known real, possible, suspected, feared, alternative and even “fringe” / paranormal aspects inescapably miring datacenters.
A 2026 power-engineering study found that hyperscale data centers behave not merely as electrical loads, but as vast power-electronics systems whose rapidly fluctuating server demands can excite grid oscillations and propagate disturbances across interconnected networks. Far from a fringe “dirty electricity” claim, the research suggests data centers may interact with the power grid in ways fundamentally different from traditional industrial facilities, raising serious new concerns about resonance, stability, reliability.
Part of a kempt, curated, growing Series deeply exploring the already numerous but not yet fully known documented real, possible, suspected, feared, alternative and even “fringe” / paranormal aspects inescapably miring Datacenters. — Index
1. Official Earthquake Seismic Monitoring
The primary organizations are:
- U.S. Geological Survey (USGS)
- Maryland Geological Survey Seismic Network
- Virginia Tech Seismological Observatory
- Advanced National Seismic System
Maryland operates its own seismic network, and real-time seismograms are publicly available. The Maryland Geological Survey states that its network continuously records local and distant earth motion and distributes the data online. (Maryland State Website)
2. Are There Seismometers In Montgomery County?
Not many.
Maryland’s dedicated state seismometers are primarily located in:
- Soldiers Delight (Baltimore County)
- Garrett County (western Maryland)
These stations feed data into state and national networks. (Maryland News –)
The Rockville earthquake of January 2024 was detected primarily through the broader USGS network rather than a dense local Montgomery County array. (WJLA)
3. What Is Recorded?
Modern broadband seismometers record:
- Ground acceleration
- Ground velocity
- Ground displacement
- Frequency spectra
- Arrival times of seismic waves
- Background seismic noise
Importantly, they record much more than earthquakes.
They also capture:
- Quarry blasting
- Construction activity
- Heavy truck traffic
- Wind-induced ground motion
- Aircraft
- Large industrial machinery
- Train traffic
Maryland’s own documentation explicitly discusses “seismic noise” from human activity obscuring natural signals. (Maryland State Website)
4. Loudoun County
Loudoun does not appear to have a dedicated county-operated seismic network.
Instead it relies on:
- USGS stations
- Virginia Tech Seismological Observatory
- Regional ANSS stations
Virginia Tech has been one of the primary seismic-monitoring organizations for Virginia since the 1960s. (energy.virginia.gov)
5. What Would Be Needed To Measure Data-Center Effects?
This is where things become interesting.
Traditional earthquake monitoring stations are often tens of miles apart.
If someone wanted to scientifically determine whether:
- large data centers
- cooling plants
- substations
- transmission corridors
- diesel-generator farms
were producing measurable ground vibration, they would normally deploy:
- local broadband seismometers
- geophones
- infrasound sensors
- accelerometers
within hundreds of feet to a few miles of the facilities.
The existing state earthquake network is generally too sparse to characterize subtle local industrial vibration sources.
6. What Data Already Exists Near You?
For Montgomery County and Loudoun County, the routinely archived data includes:
Seismic
- Maryland Geological Survey
- USGS
- Virginia Tech Seismological Observatory
Infrasound (partial)
Some federal research stations record atmospheric low-frequency pressure waves, though not specifically for county-level monitoring.
Power Grid
- PJM Interconnection
- Dominion Energy
- Pepco
- transmission-system disturbance logs
Environmental Noise
Occasional studies by local governments, consultants, and permitting processes.
7. The Most Interesting Untapped Question
If your interest is Dickerson and the proposed Montgomery County data-center developments, the most useful instrument would probably not be a traditional earthquake seismometer.
It would be a small local array consisting of:
- broadband seismometers (0.01–50 Hz)
- geophones
- infrasound microphones
- power-quality analyzers
deployed before construction and then operated continuously afterward.
That would create a genuine before-and-after record of:
- ground vibration
- low-frequency noise
- harmonic electrical activity
- atmospheric pressure fluctuations
which could then be compared to facility operating schedules.
At present, I am not aware of any publicly available permanent seismic array specifically deployed around the proposed Dickerson data-center sites for that purpose. The routine seismic data available for the area comes primarily from state and federal earthquake-monitoring networks. (Maryland State Website)