Overview

SWEET is an interactive web application for designing earthquake rupture scenarios and computing broadband synthetic ground-motion waveforms. The workflow follows five sequential steps shown in the top navigation bar:

You can navigate back at any time with the Back buttons or by clicking the SWEET logo (returns to the landing page). A built-in tutorial is available from the landing page.

Landing Page — Choose Your Starting Mode

1Rupture — Fault Geometry

Click anywhere on the map to place the fault's top-edge centre point, or type coordinates directly. Then configure:

2Kinematics

After computing, the fault plane shows four tabs: Slip · Moment · Rupture Time · STF. A 2D/3D toggle switches between map and perspective views.

3Sources — Subsource Grouping

Fault patches are clustered into subsources — point-source equivalents for the Green's function summation. Set the target subsource Mw: groups accumulate patches until their cumulative moment equals this magnitude. Smaller value → more groups → finer resolution but longer compute time. Recommended: 0.3–0.7 below the total event Mw.

4Stations

5Waveforms — Compute & Results

Click Compute Waveforms. The server matches every subsource–station pair to a pre-computed Green's function template, applies rupture-time delays and moment scaling, sums all contributions, and returns one miniSEED file per realisation. Typical time: 10–120 seconds.

The Results panel shows:

• Summary stats — stations with templates, realisations generated
• Map coloured by PGA — click a station marker to highlight it
• Plots drawer: Waveform overview · PGA vs. distance · PGV vs. distance · Shakemap
• Download button for the raw .mseed file (ObsPy-compatible)

Station waveform viewer: double-click any station marker to open 3-component (N / E / Z) acceleration and velocity traces.

Tips & Best Practices

• Start with Mw 6.5–7.0 and 20–50 stations to verify the setup before large jobs.
• The Suggested Mw in the geometry summary is a good starting point for the kinematics magnitude slider.
• If many stations show "template not found", reduce max distance or keep Mw within 5.0–8.0.
• Results expire after 2 hours on the server — download .mseed files before closing the browser.
• Rate limit: 2 compute jobs per minute per IP address. Wait ~60 s if you hit the limit.