Seismology & Seismic Hazard
Acceleration or Velocity Data for Earthquake Monitoring?
Accelerometers excel at strong near-field shaking and PGA; broadband seismometers see small distant events with less noise. Here is how to choose,…
READ MORESeismology & Seismic Hazard
Seismology and seismic hazard articles: earthquake magnitude and intensity scales, ground motion, site effects, scenario hazard mapping, and regional risk studies for cities such as Istanbul.
Seismology & Seismic Hazard
Which Istanbul District Will Shake the Most in an Earthquake?
A 2024 study by Kalkan and Gulkan puts Istanbul's western shoreline at highest earthquake risk, with median PGA of 0.65 g in…
READ MORE
Seismology & Seismic Hazard
Modified Mercalli Intensity Scale (MMI) Explained
MMI measures an earthquake's effects at each location on a twelve-level scale, while magnitude measures energy at the source. Here is how…
READ MORE
Seismology & Seismic Hazard
Why Seismologists Moved From Richter to Moment Magnitude
The Richter scale was built for 1930s California seismographs and tops out near M7. Here is why moment magnitude, introduced in 1979,…
READ MORE
Company News
Assessing Seismic Risk in Istanbul: High-Resolution Hazard Maps
Kalkan and Gulkan model six Istanbul earthquake scenarios with six GMPEs and site amplification, mapping PGA and spectral acceleration to show where…
READ MORE
Seismology & Seismic Hazard
Istanbul Earthquake Scenarios vs the 1999 M7.6 Izmit Quake
A scenario study with Prof. Polat Gulkan finds western Istanbul could shake more than three times harder than in the 1999 M7.6…
READ MORE