The Incorporated Research Institutions for Seismology Data Management Center (IRIS‐DMC) Data Products timeline showing product release dates. Background color of the text boxes indicates the category of the product/effort as indicated by keys on the upper left.
Data products at the IRIS‐DMC span a wide range of frequencies from normal‐mode ShakeMovie (SM) 1D synthetics to University of Washington Continuous Envelope Functions with high‐frequency corners up to 16 Hz.
One year of IRIS‐DMC data products user access from 25 April 2015 to 25 April 2016 are plotted. The black bars and bold numbers show the total number of unique daily IP addresses accessing the available data products. The gray overlapping bars for our most popular earthquake‐based data products indicate the percent of the total hits occurring within 5 days of the four major seismic events listed in the legend. The stars indicate data products contributed by members of the seismology research community.
Among the event source time function (STF) summary figures available are plots with the results aligned by source‐to‐receiver azimuth. The STFs are shaded by their cross‐correlation coefficient. For the 15 November 2006 M 8.3 Kuril event, which ruptured toward the northeast for almost 200 km (Lay et al., 2009), the STFs appear overall widest at azimuths around 200° and narrowest at azimuths around 0°–60°, consistent with a unilateral rupture toward the northeast.
Global stacks made by stacking short‐ to long‐term average functions of waveform data available from IRIS from >2500 shallow earthquakes from 1995 to 2013 using different components (vertical, radial, and transverse) of data in different frequency bands. This composite image combines global stacks from long‐period data low‐pass filtered below 10 s for vertical (dark blue), radial (green), and transverse (red) component data as well as a stack of global stacks using broadband vertical data filtered around 1, 2, 3, 4, 6, and 8 s periods (light blue). (Inset) Composite figure from Astiz et al. (1996) which uses a similar color scheme and slightly different frequency bands. The figure has been reflected about the vertical axis for comparison.
A snapshot of the Earth Model Collaboration 3D Visualizer interface showing three horizontal and two vertical slices from 16 model NWUS11 (James et al., 2011). The Cascadia slab from Slab 1.0 (Hayes et al., 2012) and crustal thickness from Crustal_Thickness_Error (Gilbert, 2012), and earthquake locations are superimposed.
Automatically generated record section for the Infrasound Automated Event Location Using a Mesh of Arrays (AELUMA) detected infrasound event of 16 October 2012 04:26:40. Traces from stations used by the AELUMA detection are in dark, whereas those not used are in light brown. Traces are filtered between 0.8 and 3 Hz and are normalized by their peak amplitude. The green line shows the travel time for a best‐fitting mean celerity of 291.5 m/s as computed by AELUMA for this event. (Inset) Location of the event (red circle), location of Transportable Array (TA) stations with pressure sensors (yellow circles), location of TA stations within 7° from the source (light brown circles), and location of TA stations that contributed to this AELUMA event location (overlain dark brown circles).
Screenshot of animation of the aftershocks within 10 days from the 11 March 2011 M 9.1 Tohoku earthquake. Movies like this are generated in near‐real time and updated frequently in the 10 days following the event. Circle sizes and colors are scaled by magnitude and depth and transparently fade with time. When available, Global Centroid Moment Tensor focal mechanisms are plotted in place of a circle.
The path and wind speeds (in blue) of super typhoon Haiyan (formed on 3 November 2013 and dissipated on 11 November 2013), based on data from the U.S. Naval Research Laboratory Marine Meteorology division. Location of seismic station IU.DAV is marked in red. The left inset shows the probability density functions of power spectral densities (PSDs) computed using the Noise Toolkit (NTK) PSD bundle for the BHZ, BH1, and BH2 channels of station IU.DAV for 2013. The right inset plot shows the median power values of the PSDs (BHZ, BH1, and BH2 channels) calculated by the NTK microseism energy bundle within the 5–10‐s secondary microseism band. The microseismic power plotted has been smoothed using a sliding 6‐hr window.