Dr. Cevat Şener
Dept. of Computer Engineering,
Middle East Technical University,
06800 Ankara, Turkey
sener@ceng.metu.edu.tr
Outline
 Need for SHA
 Elements
 Demo Video
 Suggested Improvement
 Wrap-up
Need for SHA
 Seismic Hazard Analysis (SHA) is very important
 for public safety and hazards mitigation
 in design and construction of highways, bridges, dams and
industrial buildings;
 for protection of energy facilities, special occupancy
structures like hospitals, schools and fire stations;
 for correct determination of earthquake insurance premiums
 However, this process is very expensive as involves many
models to be applied that need to access several types of
data.
 Hence, seismic hazard/risk maps are not kept up-to-date,
or they may not be at required level of granularity.
... and when seismic risks are not
considered properly ...
SRA  SHA
 Seismic Hazard Analysis is core to Seismic Risk
Assessment:
While SHA describes the EQ-related phenomena that
have potential to cause harm and the associated
occurrence frequencies,
SRA assesses the probability of occurrence of losses as
a result of the seismic hazard.
 This application/portlet is named “SRA” for historical
reasons, and then later renamed to “SHA”.
Elements
User
Interaction
Master EQ
Source Model
Data
Repository
Engine
Alternative
Models and
Attenuations
SDS Interface
 User Interaction
 Web-based GUI is a portlet on the P-GRADE Portal.
 It is a multipage portlet
1.
2.
3.
4.
Project management
Parameter set management
Detailed parameter settings
Job management
 JavaScript is used for
 Google Maps API
 Parameter value validation
 Visualization of output graphs
 Directory structure for user/project/parameter-set
management:
portal_work/users/<username>/sha
|-----<project_1>
|
|---- -- <parameter_set_1>
|
|
|------- parameters
|
|
|------- job status & logs
|
|
|------- outputs
|
|------- <parameter_set_2>
|
|
|------- …
|
|------- …
|
|-----<project_2>
|
|------- …
|
|-----…
 It allows embedding alternative models and
attenuation relations.
 Master EQ Source Model is embedded into the hazard
calculations.
 Its Engine handles the job management through WMS
client tools of gLite.
 Number of processors required by the application
depends on the number of grids (sub-regions) that the
site divided into.
 Bash scripts are used for Grid job management.
 It can access and use EQ catalog data served by SDS
(Seismic Data Server)
 developed by Boğaziçi University,
 provides official lists of earthquakes, stations and sensor
information through a high-level interface through C++
iterators.
 Data Repository
 It maintains a data repository for EQ catalogs, fault
planes, area sources, site conditions, attenuation
relations, produced results...
 R*-tree index is used to access this repository on SEs.
Demo Video
 Duration: <4 min.
 Steps
 Login to the P-GRADE Portal
 Check credentials, and switch to the SHA portlet
 Submit a job for a site in MK
 Go through the results of a previous job for a site in TR
 Check the status of the job for the MK site
 Go through its results when done
 Video: [click here]
Improvement to suggest
 Project management API
 For handling a user-level hierarchical project structure
 Maybe extended to provide a multi-user collaborative
environment around projects (models)
Wrap-up
 It is not straightforward
 to go along with dynamically changing nature of the
seismic hazard problem and
 to produce up-to-date assessment figures continuously.
 A Portal-based approach to attack the problem is
introduced.
Thank you…
Questions?
Acknowledgement:
This study is supported by the FP7 SEE-GRID-SCI project,
funded by the EC under the contract RI-211338.