Lightweight earthquake/event picker

[dlnorgaard]

VDAP Geophysics team requests feature to pick, locate, and visualize earthquakes in Swarm.

• Ability for user to make picks (P, S, and polarity/amplitude)
• Ability for user to select windows (error window for P and S, and duration for particle motion analysis). - Error window for P/S could possibly be a duration specified for uncertainty on either side of the P or S.
• Coda duration is already calculated in Swarm. However, users would like to be able to determine window based on P pick if one exists. Otherwise select start/end time as currently done.
• Ability to specify impulsiveness of phases (I for impulsive, E for emergent)
• User will likely do one of above at a time. Having multiple pick lines and highlighted duration may clutter wave view. However, an option to toggle turn on all selection will be helpful.
• Calculate S-P time and distance.
• Users would like to see all three components of the wave while doing the picks so doing it in the clipboard may be best.
• Locate events using existing location algorithms. Hypoinverse is the preferred algorithm. However, a Java version of hypo71 is available.
• Use error window to determine weight input into hypo71 (and possibly other location algorithms). Team will provide mapping logic here.
• Users would like ability to store picked or located events and to be able to refer to it at a later time. Export to QuakeML?
  -There should be an option for pre-defined list of classifications of events that user can choose from (may vary by observatory), but also provide ability to add new ones.
• Plot location on map
• Plot cross-sections and energy of earthquakes with time

[tparker-usgs]

Users would like ability to store picked or located events and to be able to refer to it at a later time. Export to QuakeML?
-There should be an option for pre-defined list of classifications of events that user can choose from (may vary by observatory), but also provide ability to add new ones.

The list should match the QuakeML EventType enumeration.

[dlnorgaard]

Suggestion from Wes on S-P distance plot.

On Fri, Apr 14, 2017 at 7:48 AM, Weston Thelen wthelen@usgs.gov wrote:
This came up on my twitter feed, and you came to mind. Plotting the s-p time on the map in swarm would make the measurement extremely easy to interpret.

http://www.iris.edu/hq/inclass/software-web-app/plotting_your_sp_location_results_in_google_earth

[dlnorgaard]

Added to version 2.7.0:

• Ability for user to make picks (P, S, and polarity/amplitude)
• Ability to specify impulsiveness of phases (I for impulsive, E for emergent)
• Calculate S-P time and distance.
• Users would like to see all three components of the wave while doing the picks so doing it in the clipboard may be best.

[dlnorgaard]

Added to version 2.7.1:

• Pick Mode enhancements:
  • Add ability to select pick uncertainty
  • Plot S-P in map
  • QuakeML import/export
  • Add key stroke shortcut
• Fix bug in map line color selection

[dlnorgaard]

Implemented in 2.8.0. Will open new tickets for enhancements/bugs.