[KOYNA] KOYNA - Probing Reservoir Triggered Earthquakes at Koyna, India through Scientific Deep Drilling

ICDP-Topics:
Climate & Ecosystems
Natural Hazards
Faults


Year of Application: 2015

Expedition ID: 5058

Current Status: ongoing

ICDP-2015/02
KONYA
asia
deep borehole observatory
drilling
india
reservoir-triggered seismicity
Master Data

Prof. Dr. Serge A. Shapiro (PI)
Prof. Dr. Marco Bohnhoff (PI)
Prof. Dr. Hans-Joachim Kümpel (PI)
Prof. Dr. Georg Dresen (PI)

Dr. Thomas Wiersberg (OSG)
Ronald Conze (OSG)
Dr. Ulrich Harms (OSG)
Jochem Kück (OSG)
Prof. Dr. Roland Oberhänsli (Scientific Participant)
Prof. Dr. Ernst Huenges (Scientific Participant)
Prof. Dr. Jochen Zschau (Scientific Participant)
Dr. Anja Maria Schleicher (Scientific Participant)
Dr. Axel Liebscher (Scientific Participant)

Projektstart: 15 September, 2015
Projektdauer: 24
Geologisches Alter: paleogene

Latitude: 17°24'6''N
Kontinente:

Asia

Regionen & Städte:

Konya

Longitude: 73°45'6''E
Länder:

India

Themen:

continental
hard rock

Drilling Data

Drilling Depth: 3014.0
Core Yield: 51.5
Core Length: 51.5
Amount of Drill Holes: 1
Amount of Drill Locations: 1

Core Length-Drill Depth-Ratio: 1.7
Core Yield-Core Length-Ratio: 100.0

Description

The Koyna Dam located close to the west coast of India is the most outstanding example of Reservoir Triggered Seismicity RTS, where triggered earthquakes have been occurring in a restricted area of 20x30 sq km since the impoundment of Shivajisagar Lake in 1962. These include the largest triggered earthquake of M~6.3 on Dec 10 1967, 22 earthquakes of M>5, about 200 earthquakes of M~4, and several thousand smaller earthquakes since 1962. The earthquake frequency increases every year following the monsoon rains in the months of June and July; almost every year one or more M~4 earthquakes occur. There is no other source of seismic activity within 50 km of the Koyna Dam.