The earthquake swarm of December 2007 in the Mila region of northeastern Algeria
Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Semmane, F. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2012 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer Science+Business Media B.V. 2012 |
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| Übergeordnetes Werk: |
Enthalten in: Natural hazards - Springer Netherlands, 1988, 64(2012), 2 vom: 11. Aug., Seite 1855-1871 |
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| Übergeordnetes Werk: |
volume:64 ; year:2012 ; number:2 ; day:11 ; month:08 ; pages:1855-1871 |
| Links: |
|---|
| DOI / URN: |
10.1007/s11069-012-0338-7 |
|---|
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OLC2053655224 |
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| 520 | |a Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. | ||
| 650 | 4 | |a Triggered seismicity | |
| 650 | 4 | |a Earthquake swarm | |
| 650 | 4 | |a Water transfer | |
| 650 | 4 | |a Beni Haroun dam | |
| 650 | 4 | |a Mila, northeastern Algeria | |
| 650 | 4 | |a Pore fluid pressures | |
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| 700 | 1 | |a Yelles-Chaouche, A. K. |4 aut | |
| 700 | 1 | |a Haned, A. |4 aut | |
| 700 | 1 | |a Beldjoudi, H. |4 aut | |
| 700 | 1 | |a Amrani, A. |4 aut | |
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10.1007/s11069-012-0338-7 doi (DE-627)OLC2053655224 (DE-He213)s11069-012-0338-7-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn Semmane, F. verfasserin aut The earthquake swarm of December 2007 in the Mila region of northeastern Algeria 2012 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V. 2012 Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. Triggered seismicity Earthquake swarm Water transfer Beni Haroun dam Mila, northeastern Algeria Pore fluid pressures Abacha, I. aut Yelles-Chaouche, A. K. aut Haned, A. aut Beldjoudi, H. aut Amrani, A. aut Enthalten in Natural hazards Springer Netherlands, 1988 64(2012), 2 vom: 11. Aug., Seite 1855-1871 (DE-627)131010271 (DE-600)1088547-X (DE-576)03285272X 0921-030X nnns volume:64 year:2012 number:2 day:11 month:08 pages:1855-1871 https://doi.org/10.1007/s11069-012-0338-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-GGO SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 64 2012 2 11 08 1855-1871 |
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10.1007/s11069-012-0338-7 doi (DE-627)OLC2053655224 (DE-He213)s11069-012-0338-7-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn Semmane, F. verfasserin aut The earthquake swarm of December 2007 in the Mila region of northeastern Algeria 2012 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V. 2012 Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. Triggered seismicity Earthquake swarm Water transfer Beni Haroun dam Mila, northeastern Algeria Pore fluid pressures Abacha, I. aut Yelles-Chaouche, A. K. aut Haned, A. aut Beldjoudi, H. aut Amrani, A. aut Enthalten in Natural hazards Springer Netherlands, 1988 64(2012), 2 vom: 11. Aug., Seite 1855-1871 (DE-627)131010271 (DE-600)1088547-X (DE-576)03285272X 0921-030X nnns volume:64 year:2012 number:2 day:11 month:08 pages:1855-1871 https://doi.org/10.1007/s11069-012-0338-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-GGO SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 64 2012 2 11 08 1855-1871 |
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10.1007/s11069-012-0338-7 doi (DE-627)OLC2053655224 (DE-He213)s11069-012-0338-7-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn Semmane, F. verfasserin aut The earthquake swarm of December 2007 in the Mila region of northeastern Algeria 2012 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V. 2012 Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. Triggered seismicity Earthquake swarm Water transfer Beni Haroun dam Mila, northeastern Algeria Pore fluid pressures Abacha, I. aut Yelles-Chaouche, A. K. aut Haned, A. aut Beldjoudi, H. aut Amrani, A. aut Enthalten in Natural hazards Springer Netherlands, 1988 64(2012), 2 vom: 11. Aug., Seite 1855-1871 (DE-627)131010271 (DE-600)1088547-X (DE-576)03285272X 0921-030X nnns volume:64 year:2012 number:2 day:11 month:08 pages:1855-1871 https://doi.org/10.1007/s11069-012-0338-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-GGO SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 64 2012 2 11 08 1855-1871 |
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10.1007/s11069-012-0338-7 doi (DE-627)OLC2053655224 (DE-He213)s11069-012-0338-7-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn Semmane, F. verfasserin aut The earthquake swarm of December 2007 in the Mila region of northeastern Algeria 2012 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V. 2012 Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. Triggered seismicity Earthquake swarm Water transfer Beni Haroun dam Mila, northeastern Algeria Pore fluid pressures Abacha, I. aut Yelles-Chaouche, A. K. aut Haned, A. aut Beldjoudi, H. aut Amrani, A. aut Enthalten in Natural hazards Springer Netherlands, 1988 64(2012), 2 vom: 11. Aug., Seite 1855-1871 (DE-627)131010271 (DE-600)1088547-X (DE-576)03285272X 0921-030X nnns volume:64 year:2012 number:2 day:11 month:08 pages:1855-1871 https://doi.org/10.1007/s11069-012-0338-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-GGO SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 64 2012 2 11 08 1855-1871 |
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10.1007/s11069-012-0338-7 doi (DE-627)OLC2053655224 (DE-He213)s11069-012-0338-7-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn Semmane, F. verfasserin aut The earthquake swarm of December 2007 in the Mila region of northeastern Algeria 2012 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media B.V. 2012 Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. Triggered seismicity Earthquake swarm Water transfer Beni Haroun dam Mila, northeastern Algeria Pore fluid pressures Abacha, I. aut Yelles-Chaouche, A. K. aut Haned, A. aut Beldjoudi, H. aut Amrani, A. aut Enthalten in Natural hazards Springer Netherlands, 1988 64(2012), 2 vom: 11. Aug., Seite 1855-1871 (DE-627)131010271 (DE-600)1088547-X (DE-576)03285272X 0921-030X nnns volume:64 year:2012 number:2 day:11 month:08 pages:1855-1871 https://doi.org/10.1007/s11069-012-0338-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-MAT SSG-OPC-GGO SSG-OPC-MAT GBV_ILN_40 GBV_ILN_70 AR 64 2012 2 11 08 1855-1871 |
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the earthquake swarm of december 2007 in the mila region of northeastern algeria |
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The earthquake swarm of December 2007 in the Mila region of northeastern Algeria |
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Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. © Springer Science+Business Media B.V. 2012 |
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Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. © Springer Science+Business Media B.V. 2012 |
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Abstract In December 2007, the Mila region of northeastern Algeria experienced thousands of microearthquakes (0.8 ≤ Md ≤ 3.9) recorded by eight temporary stations, in addition to permanent stations. Most of the events were too small to be located precisely, but a set of 122 precisely located events shows an alignment of epicenters, extending mainly in a horizontal band at about 1–2 km depth in a NNW–SSE direction and concentrated in a small area, 3 km southeast of Jebel Akhal, a small rocky hill between the Beni Haroun dam/reservoir and the Oued Athmania reservoir. The reservoirs are connected by pipelines, and a pumping station ensures water can be transferred between them at transient pressures of up to 80 bars. During the pumping in 2007, only 45 % of the transferred water (~600,000 $ m^{3} $ per day) was recovered at the Oued Athmania reservoir, and a large amount of the slightly pressurized water leaked through defective joints in a tunnel that passes through the Jebel. This water penetrated deeply into the soil with the assistance of preexisting fractures, faults, and karsts. Nine days after the first pumping started, a local increase in pore fluid pressures at shallow depths triggered seismicity southeast of Jebel Akhal, where the faults were probably close to failure. The focal mechanisms show a near vertical N–S strike-slip fault plane under regional NW–SE tectonic compression. One of the fault plane solutions is consistent with the NNW–SSE direction along which the seismic events are aligned. Furthermore, a long-term comparison of the seismic activity in the region versus water levels behind the dam and the pumping of water shows that the earthquake swarm was a one-off event related to the pumping operation. © Springer Science+Business Media B.V. 2012 |
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