In this plot, a reboot is shown at 11AM where we did maintenance. Layers composited on the Time Series plot to make the Daily Pulse Plot are:
Kp Planetary Activity
- Published by NOAA (The National Oceanic and Atmospheric Administration) as a global value every hour. The level of activity in the Earth’s geomagnetic field is represented by an indicator in the range of 1-3 (Green), 4-6 (Yellow) and 6-9 (Red). The highest levels of activity can generate large signals that are seen across the QuakeFinder network. The Kp indicators are spaced one hour apart and are proportionally taller for higher levels of activity.
- This is a compound Marker that is overlaid onto the geophone trace. In the example above, an m4.5 earthquake is shown. The magnitude is written at the top of the plot, and in this example there are two reports in the ANSS catalog, and therefore two markers are drawn here almost on top of each other. The diamond gets larger for larger quakes, but range, depths, and compass bearing are also given by the mark. Range to an earthquake is depicted by the ladder rungs rising above the diamond, in this case the quake is 44 Km from the site. Each ladder rungs denotes 10 Km. Depth is depicted by the down ladder rungs, each also 10 Km spaced. Compass bearing is shown by the lines angled down to the left, in this case the earthquake is to the Southwest of the site.
- These are tiny diamonds overlaid onto the waveform data. They indicate the that automated detection of a pulse in the data has occurred. See the discussion below for a more complete detection of what a pulse is and how it is detected. For each channel, a pulse count summary is provided up and to the left of the trace. As an example, the annotation for the Blue trace reads ‘qf1: Up: 12 Down : 4 Total: 16. It means that there are sixteen diamonds total overlaid on the blue trace Twelve of them are “Up” pulses, meaning that they protrude up from the signal waveform in the positive direction (up on the plot). The other four pulses are “Down” pulses, meaning that they protrude in the negative (down) direction on the plot.
- These are the Red (high) and Green (low) above and below the waveform data. These serve as a general visual guide as to whether the waveform has risen high (or low) enough to trigger detailed analysis of the pulse. Not all waveforms that cross these thresholds are cataloged. Some have too short (or too long) a duration. Others are bi-polar (see below). Note also that the small number to the right end of the threshold lines. This is the actual threshold value in 24bit ADC counts, where the range of possible values is 0-2^24.
- + – The pulse detector threshold.
- T0 – The start time of the pulse.
- TP – The time of the peak of the pulse.
- T1 – The end time of the pulse.
- P – The peak amplitude of the pulse.
- E – The energy of the pulse.