NESS: NEar-Source Strong-motion flat-file

NESS is a flat-file of ground-motion parameters and related metadata of manually processed near-source waveforms from moderate-to-large worldwide events.

NESS flat-file is compiled according to the following criteria:

• earthquakes with moment magnitude ≥ 5.5 and hypocentral depth ≤ 40 km;
• availability of geometrical information about the finite fault model
• availability of strong-motion records in epicentral area and in free-field conditions (i.e. maximum source-to-site distance within one fault length, defined through seismological scaling relations).

NESS (v.2.0) is distributed in two '.zip' files:

• 'NESS2_flat-file.csv' parametric table in .csv format separated by ";", containing elastic spectral acceleration ordinates (5% damped) and other Intensity Measures of ground motion with associated metadata;

• 'NESS2_flat-file_eBASCO.csv' parametric table in .csv format separated by ";", containing elastic spectral displacement ordinates (SD) and permanent displacement of ground motion with associated metadata calculated using the extended BASeline COrrection processing (eBASCO, D'Amico et al., 2018);

Each zip file contains the parametric table and several dictionaries ('.txt' files) explaining the abbreviations fields of the parametric tables (each dictionary has the same field name).
The dictionary 'reference.txt' contains the full citations of the references shortened in the fields named as '*_ref' and 'data_source_ref.txt' lists the public archives from which the original raw waveforms were recovered to build NESS2.

The User Manual providing a brief description of the table fields is available here.

In the flat-files, the Intensity Measures are flagged as:

• U: 1st component
• V: 2nd component
• W: 3rd component
• FN: fault-normal component
• FP: fault-parallel component
• RotD50: median component
• RotD100: maximum component

U, V, W are the waveform components oriented according to '_*azimuth_deg' fields and not only to the North-South, East-West, and vertical directions (see http://www.fdsn.org/seed_manual/SEEDManual_V2.4.pdf, pag. 134).
FP and FN waveform components are oriented according to the fault strike and fault strike+90°, respectively.
RotD50 and RotD100 are the median and maximum value of the intensity measures distribution, obtained from rotated waveforms.

Citation

If you use the 'NESS2_flat-file.csv' flat-file, cite as:

Sgobba, S., Pacor, F., Felicetta, C., Lanzano, G., D'Amico, M. C., Russo, E., & Luzi, L. (2021). NEar-Source Strong-motion flatfile (NESS), version 2.0 (Version 2.0) [Data set]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/NESS.2.0

If you use the 'NESS2_flat-file_eBASCO.csv' flat-file, cite as:

D'Amico, M. C., Schiappapietra, E., Felicetta, C., Sgobba, S., Pacor, F., Lanzano, G., Russo, E., & Luzi, L. (2021). NEar-Source Strong-motion flatfile from eBASCO (NESS-eBASCO), version 2.0 (Version 2.0) [Data set]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/NESS.2.0_EBASCO

Previous versions

NESS1 (2018): Pacor, F., Felicetta, C., Lanzano, G., Sgobba, S., Puglia, R., D’Amico, M. C., … Luzi, L. (2018). NEar-Source Strong-motion flatfile (NESS) (Version 1.0) [Data set]. Istituto Nazionale di Geofisica e Vulcanologia (INGV). https://doi.org/10.13127/NESS.1.0

Acknowledgments

This study has been partially developed within the research programs INGV-ReLUIS (Rete dei Laboratori Universitari di Insegneria Sismica) in the framework of the DPC-ReLUIS Agreement 2019-2021 "COntributi Normativi Progetto Azione Sismica (CONPAS)" WP18, funded by the Presidenza del Consiglio dei Ministri - Dipartimento della Protezione Civile (DPC) , Italy and the project RS2 "Earthquake Simulations and Near-Source Effects" under the Agreement DPC-ReLUIS 2014-2018.
The Authors are grateful to the project coordinator, Roberto Paolucci, for supporting and encouraging the development of this work. Authors are also thankful to Andrè Herrero for suggesting how to compute the near-source distance, and Georgios Baltzopoulos (Università degli Studi Federico II di Napoli, Italy) for having identified the pulse-like records. Finally, the authors thank Chiara Maini who contributed to the initial construction of NESS dataset, during her thesis work.

License

NESS strong-motion flat-files are licensed under the terms of the "Creative Commons Attribution 4.0 International (CC BY 4.0)" License. This means that you are free to share (copy and redistribute the material in any medium or format) and adapt (remix, transform, and build upon the material) the data. The licensor cannot revoke these freedoms as long as you follow the license terms of attribution (you must give appropriate credit, provide a link to the license, and indicate if changes were made).

Disclaimer

This site provides access to the parametric table containing NEar-Source Strong-motion parameters and associated earthquake, station and waveform metadata. Although all the parameters have been checked by analysts, no warranty, implicit or explicit is attached to the data. Every risk due to the improper use of data or the use of inaccurate information is assumed by the user.

Publications

Sgobba S., Felicetta C., Lanzano G., Ramadan F., D’Amico M., Pacor F. (2021); NESS2.0: An Updated Version of the Worldwide Dataset for Calibrating and Adjusting Ground‐Motion Models in Near Source. Bulletin of the Seismological Society of America; doi:https://doi.org/10.1785/0120210080

Sgobba S., Lanzano G., Pacor F., Felicetta C. (2021); An Empirical Model to Account for Spectral Amplification of Pulse-Like Ground Motion Records. Geosciences; 11, 15. doi:https://doi.org/10.3390/geosciences11010015

Schiappapietra E., Felicetta C., D’Amico M. (2021); Fling-Step Recovering from Near-Source Waveforms Database. Geosciences; 11, 67. doi:https://doi.org/10.3390/geosciences11020067

D'Amico M., Schiappapietra E., Lanzano G., Sgobba S., Pacor F. (2020); Fling-step recovering from near-source waveforms and ground displacement attenuation models, EGU General Assembly 2020, Online, 48 May 2020, EGU2020-22285. doi:https://doi.org/10.5194/egusphere-egu2020-22285

Baltzopoulos G., Luzi L., Iervolino I. (2020); Analysis of Near‐Source Ground Motion from the 2019 Ridgecrest Earthquake Sequence. Bulletin of the Seismological Society of America; 110 (4): 14951505. doi:https://doi.org/10.1785/0120200038

D’Amico M., Felicetta C., Schiappapietra E., Pacor F., Gallovič F., Paolucci R., Puglia R., Lanzano G., Sgobba S., Luzi L. (2018); Fling Effects from Near‐Source Strong‐Motion Records: Insights from the 2016 Mw 6.5 Norcia, Central Italy, Earthquake. Seismological Research Letters; 90 (2A): 659671. doi:https://doi.org/10.1785/0220180169

Pacor F., Felicetta C., Lanzano G., Sgobba S., Puglia R., D’Amico M., Russo E., Baltzopoulos G., Iervolino I. (2018); NESS v1.0: A worldwide collection of strong-motion data to investigate near source effects. Seismological Research Letters. https://doi.org/10.1785/0220180149

Feedback

You can leave feedback writing to sara.sgobba@ingv.it. Thank you!