Real-Time Comparison of three gPhones Running Simultaneously at three Different Locations

Three gPhone Gravimeters are running simultaneously - one near Boulder, Colorado USA (red curve below), another at Scintrex's facility near Toronto, Ontario, Canada (green curve below), and a third in Walferdange, Luxembourg (blue curve below). The plot (click on it for a high-resolution version) is updated each day, and seismic events of interest from around the world are annotated when applicable. The vertical scale is in milligals, with an arbitrary offset to see the separate response of the instruments in detail. Click on the date on the X axis to see that day's data in detail.

Here are the locations of the three gPhones in Colorado, Ontario, and Luxembourg: