Last night, 14Jan2018, a LARGE magnitude 7.2 Peruvian earthquake was forefront in the shaking. The event occurred at 09:18hrs UTC (03:18 am CST) and had a focal depth of ~36km deep. No tsunami warning was issued. Three Raspberry Shake stations: RAD87 in Spring, TX, RAC22 in Oakton, VA and R0EF8 in Boston, MA, recorded this large seismic event. Below is a comparison of these three stations*. Why do they appear slightly different?
* Data provided by K.Fink, J. Pulli and A. Kafka, image courtesy of A. Kafka
In the coming months, we plan to bring forth a new inquiry-based investigation to compare and quantify the differences we observed between the Raspberry Shakes recorded images and the same events observed on an EQ-1 educational seismograph. Below is a sample of the SAME M7.2 Peruvian earthquake recorded on a Raspberry Shake (top) and at an nearby EQ-1 educational seismograph (bottom)**
**Data and images courtesy of A. Kafka