A new seismic survey technology using underwater speaker detected a low-velocity zone near the seafloor: an implication of methane gas ... View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2019-12

AUTHORS

Tetsuro Tsuru, Kazuo Amakasu, Jin-Oh Park, Junichi Sakakibara, Mamoru Takanashi

ABSTRACT

Owing to the strict restrictions on the use of air guns in marine seismic surveys due to concerns about their potential impact on the marine ecosystem, there have been several cases where seismic surveys were not permitted. This tendency has been particularly significant in coastal waters where fishing activity is flourishing, which creates blank zones in seismic surveys. The authors, therefore, adopted underwater speakers as environment-friendly seismic sources that can be used under such restrictions. In December 2017, the applicability of underwater speakers as a seismic source was tested in a seismic reflection experiment in the northern part of Tokyo Bay. As a result, shallow subsurface structures were successfully imaged, and a low-velocity zone was detected 7–8 m below the seafloor. In this paper, the concept of environment-friendly seismic survey using underwater speakers is reported. In addition, the potential presence of a methane gas layer that was detected in the low-velocity zone is discussed. If the methane gas is widely distributed near the seafloor in the northern part of Tokyo Bay, a large amount of gas might be released into the water and then into the air when, for example, a large-scale earthquake occurs directly underneath the Tokyo Bay area. Given the high flammability of methane, the features and volume of its distribution must be precisely investigated from the perspective of earthquake occurrences in the metropolitan area. More... »

PAGES

31

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s40623-019-1011-0

DOI

http://dx.doi.org/10.1186/s40623-019-1011-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112896047


Indexing Status Check whether this publication has been indexed by Scopus and Web Of Science using the SN Indexing Status Tool
Incoming Citations Browse incoming citations for this publication using opencitations.net

JSON-LD is the canonical representation for SciGraph data.

TIP: You can open this SciGraph record using an external JSON-LD service: JSON-LD Playground Google SDTT

[
  {
    "@context": "https://springernature.github.io/scigraph/jsonld/sgcontext.json", 
    "about": [
      {
        "id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/0404", 
        "inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/", 
        "name": "Geophysics", 
        "type": "DefinedTerm"
      }, 
      {
        "id": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/04", 
        "inDefinedTermSet": "http://purl.org/au-research/vocabulary/anzsrc-for/2008/", 
        "name": "Earth Sciences", 
        "type": "DefinedTerm"
      }
    ], 
    "author": [
      {
        "affiliation": {
          "alternateName": "Tokyo University of Marine Science and Technology", 
          "id": "https://www.grid.ac/institutes/grid.412785.d", 
          "name": [
            "Academic Assembly, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, 108-8477, Tokyo, Japan"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Tsuru", 
        "givenName": "Tetsuro", 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "alternateName": "Tokyo University of Marine Science and Technology", 
          "id": "https://www.grid.ac/institutes/grid.412785.d", 
          "name": [
            "Academic Assembly, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, 108-8477, Tokyo, Japan"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Amakasu", 
        "givenName": "Kazuo", 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "alternateName": "University of Tokyo", 
          "id": "https://www.grid.ac/institutes/grid.26999.3d", 
          "name": [
            "Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, 277-8564, Kashiwa-shi, Chiba, Japan"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Park", 
        "givenName": "Jin-Oh", 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "name": [
            "JFE Civil Engineering and Construction, 2-17-4 Kuramae, Taito-ku, 111-0051, Tokyo, Japan"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Sakakibara", 
        "givenName": "Junichi", 
        "type": "Person"
      }, 
      {
        "affiliation": {
          "alternateName": "Japan Oil Gas and Metals National Corporation (Japan)", 
          "id": "https://www.grid.ac/institutes/grid.482819.e", 
          "name": [
            "Japan Oil, Gas and Metals National Corporation, 2-10-1 Toranomon, Minato-ku, 105-0001, Tokyo, Japan"
          ], 
          "type": "Organization"
        }, 
        "familyName": "Takanashi", 
        "givenName": "Mamoru", 
        "type": "Person"
      }
    ], 
    "citation": [
      {
        "id": "https://doi.org/10.2965/jswe.24.35", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1001950216"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.5026/jgeography.93.3_119", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1003955503"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.5026/jgeography.93.3_119", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1003955503"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1016/j.tecto.2008.05.037", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1005489767"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1145/272991.272995", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1012259932"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1016/j.egypro.2014.11.666", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1014159937"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1029/2004jb003329", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1019041319"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1029/2001jb001664", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1028462591"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.2965/jswe1978.10.470", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1039076983"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "sg:pub.10.1007/s10950-007-9080-0", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1039301593", 
          "https://doi.org/10.1007/s10950-007-9080-0"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "sg:pub.10.1186/s40623-015-0201-7", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1046087386", 
          "https://doi.org/10.1186/s40623-015-0201-7"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "sg:pub.10.1186/s40623-015-0201-7", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1046087386", 
          "https://doi.org/10.1186/s40623-015-0201-7"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1126/science.1074111", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1062446749"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1126/science.1110489", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1062452050"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.9749/jin.115.11", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1074146752"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "https://doi.org/10.1017/cbo9781139168359", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1098663240"
        ], 
        "type": "CreativeWork"
      }, 
      {
        "id": "sg:pub.10.1186/s40623-018-0803-y", 
        "sameAs": [
          "https://app.dimensions.ai/details/publication/pub.1101084653", 
          "https://doi.org/10.1186/s40623-018-0803-y"
        ], 
        "type": "CreativeWork"
      }
    ], 
    "datePublished": "2019-12", 
    "datePublishedReg": "2019-12-01", 
    "description": "Owing to the strict restrictions on the use of air guns in marine seismic surveys due to concerns about their potential impact on the marine ecosystem, there have been several cases where seismic surveys were not permitted. This tendency has been particularly significant in coastal waters where fishing activity is flourishing, which creates blank zones in seismic surveys. The authors, therefore, adopted underwater speakers as environment-friendly seismic sources that can be used under such restrictions. In December 2017, the applicability of underwater speakers as a seismic source was tested in a seismic reflection experiment in the northern part of Tokyo Bay. As a result, shallow subsurface structures were successfully imaged, and a low-velocity zone was detected 7\u20138 m below the seafloor. In this paper, the concept of environment-friendly seismic survey using underwater speakers is reported. In addition, the potential presence of a methane gas layer that was detected in the low-velocity zone is discussed. If the methane gas is widely distributed near the seafloor in the northern part of Tokyo Bay, a large amount of gas might be released into the water and then into the air when, for example, a large-scale earthquake occurs directly underneath the Tokyo Bay area. Given the high flammability of methane, the features and volume of its distribution must be precisely investigated from the perspective of earthquake occurrences in the metropolitan area.", 
    "genre": "research_article", 
    "id": "sg:pub.10.1186/s40623-019-1011-0", 
    "inLanguage": [
      "en"
    ], 
    "isAccessibleForFree": false, 
    "isFundedItemOf": [
      {
        "id": "sg:grant.7523281", 
        "type": "MonetaryGrant"
      }
    ], 
    "isPartOf": [
      {
        "id": "sg:journal.1294798", 
        "issn": [
          "1343-8832", 
          "1880-5981"
        ], 
        "name": "Earth, Planets and Space", 
        "type": "Periodical"
      }, 
      {
        "issueNumber": "1", 
        "type": "PublicationIssue"
      }, 
      {
        "type": "PublicationVolume", 
        "volumeNumber": "71"
      }
    ], 
    "name": "A new seismic survey technology using underwater speaker detected a low-velocity zone near the seafloor: an implication of methane gas accumulation in Tokyo Bay", 
    "pagination": "31", 
    "productId": [
      {
        "name": "readcube_id", 
        "type": "PropertyValue", 
        "value": [
          "193afaba62c85137540531002fda09c706086d6787b02373dea47af83a34fe82"
        ]
      }, 
      {
        "name": "doi", 
        "type": "PropertyValue", 
        "value": [
          "10.1186/s40623-019-1011-0"
        ]
      }, 
      {
        "name": "dimensions_id", 
        "type": "PropertyValue", 
        "value": [
          "pub.1112896047"
        ]
      }
    ], 
    "sameAs": [
      "https://doi.org/10.1186/s40623-019-1011-0", 
      "https://app.dimensions.ai/details/publication/pub.1112896047"
    ], 
    "sdDataset": "articles", 
    "sdDatePublished": "2019-04-11T12:42", 
    "sdLicense": "https://scigraph.springernature.com/explorer/license/", 
    "sdPublisher": {
      "name": "Springer Nature - SN SciGraph project", 
      "type": "Organization"
    }, 
    "sdSource": "s3://com-uberresearch-data-dimensions-target-20181106-alternative/cleanup/v134/2549eaecd7973599484d7c17b260dba0a4ecb94b/merge/v9/a6c9fde33151104705d4d7ff012ea9563521a3ce/jats-lookup/v90/0000000363_0000000363/records_70058_00000003.jsonl", 
    "type": "ScholarlyArticle", 
    "url": "https://link.springer.com/10.1186%2Fs40623-019-1011-0"
  }
]
 

Download the RDF metadata as:  json-ld nt turtle xml License info

HOW TO GET THIS DATA PROGRAMMATICALLY:

JSON-LD is a popular format for linked data which is fully compatible with JSON.

curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1186/s40623-019-1011-0'

N-Triples is a line-based linked data format ideal for batch operations.

curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1186/s40623-019-1011-0'

Turtle is a human-readable linked data format.

curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1186/s40623-019-1011-0'

RDF/XML is a standard XML format for linked data.

curl -H 'Accept: application/rdf+xml' 'https://scigraph.springernature.com/pub.10.1186/s40623-019-1011-0'


 

This table displays all metadata directly associated to this object as RDF triples.

142 TRIPLES      21 PREDICATES      42 URIs      19 LITERALS      7 BLANK NODES

Subject Predicate Object
1 sg:pub.10.1186/s40623-019-1011-0 schema:about anzsrc-for:04
2 anzsrc-for:0404
3 schema:author N2336dc811a4c4afd9471cc7bba15d39d
4 schema:citation sg:pub.10.1007/s10950-007-9080-0
5 sg:pub.10.1186/s40623-015-0201-7
6 sg:pub.10.1186/s40623-018-0803-y
7 https://doi.org/10.1016/j.egypro.2014.11.666
8 https://doi.org/10.1016/j.tecto.2008.05.037
9 https://doi.org/10.1017/cbo9781139168359
10 https://doi.org/10.1029/2001jb001664
11 https://doi.org/10.1029/2004jb003329
12 https://doi.org/10.1126/science.1074111
13 https://doi.org/10.1126/science.1110489
14 https://doi.org/10.1145/272991.272995
15 https://doi.org/10.2965/jswe.24.35
16 https://doi.org/10.2965/jswe1978.10.470
17 https://doi.org/10.5026/jgeography.93.3_119
18 https://doi.org/10.9749/jin.115.11
19 schema:datePublished 2019-12
20 schema:datePublishedReg 2019-12-01
21 schema:description Owing to the strict restrictions on the use of air guns in marine seismic surveys due to concerns about their potential impact on the marine ecosystem, there have been several cases where seismic surveys were not permitted. This tendency has been particularly significant in coastal waters where fishing activity is flourishing, which creates blank zones in seismic surveys. The authors, therefore, adopted underwater speakers as environment-friendly seismic sources that can be used under such restrictions. In December 2017, the applicability of underwater speakers as a seismic source was tested in a seismic reflection experiment in the northern part of Tokyo Bay. As a result, shallow subsurface structures were successfully imaged, and a low-velocity zone was detected 7–8 m below the seafloor. In this paper, the concept of environment-friendly seismic survey using underwater speakers is reported. In addition, the potential presence of a methane gas layer that was detected in the low-velocity zone is discussed. If the methane gas is widely distributed near the seafloor in the northern part of Tokyo Bay, a large amount of gas might be released into the water and then into the air when, for example, a large-scale earthquake occurs directly underneath the Tokyo Bay area. Given the high flammability of methane, the features and volume of its distribution must be precisely investigated from the perspective of earthquake occurrences in the metropolitan area.
22 schema:genre research_article
23 schema:inLanguage en
24 schema:isAccessibleForFree false
25 schema:isPartOf N36928076747e4e02899ba65b4e48e13a
26 Nba15221c9ba24fb6a85d5f3751bb8b17
27 sg:journal.1294798
28 schema:name A new seismic survey technology using underwater speaker detected a low-velocity zone near the seafloor: an implication of methane gas accumulation in Tokyo Bay
29 schema:pagination 31
30 schema:productId N1a9017bb2c084ee0a3ec1837871fa951
31 Ne206e1e329044daa817153f813778274
32 Nf6e1ccce992747b88b8ce38de5f784a5
33 schema:sameAs https://app.dimensions.ai/details/publication/pub.1112896047
34 https://doi.org/10.1186/s40623-019-1011-0
35 schema:sdDatePublished 2019-04-11T12:42
36 schema:sdLicense https://scigraph.springernature.com/explorer/license/
37 schema:sdPublisher N2d0dc69527714a53979825e55ba2578b
38 schema:url https://link.springer.com/10.1186%2Fs40623-019-1011-0
39 sgo:license sg:explorer/license/
40 sgo:sdDataset articles
41 rdf:type schema:ScholarlyArticle
42 N02d950386b2c4a12863a4a5857af9c01 schema:affiliation https://www.grid.ac/institutes/grid.412785.d
43 schema:familyName Tsuru
44 schema:givenName Tetsuro
45 rdf:type schema:Person
46 N0623976ffa0f47cebd7d6c548d3bf4da rdf:first N6f2119a07a60462a9e6d6cdf18f6c678
47 rdf:rest rdf:nil
48 N1240c02e867f44c28a54d4d5a3bf4f34 schema:affiliation https://www.grid.ac/institutes/grid.412785.d
49 schema:familyName Amakasu
50 schema:givenName Kazuo
51 rdf:type schema:Person
52 N1a9017bb2c084ee0a3ec1837871fa951 schema:name readcube_id
53 schema:value 193afaba62c85137540531002fda09c706086d6787b02373dea47af83a34fe82
54 rdf:type schema:PropertyValue
55 N2336dc811a4c4afd9471cc7bba15d39d rdf:first N02d950386b2c4a12863a4a5857af9c01
56 rdf:rest N91f02d0fd5ec453fb10930fcab277b5f
57 N2d0dc69527714a53979825e55ba2578b schema:name Springer Nature - SN SciGraph project
58 rdf:type schema:Organization
59 N36928076747e4e02899ba65b4e48e13a schema:issueNumber 1
60 rdf:type schema:PublicationIssue
61 N3f0579d5742d4feb91355d27a7c5da6f rdf:first N40fe841002e64b96a0d0f2c4cec2fcc5
62 rdf:rest N0623976ffa0f47cebd7d6c548d3bf4da
63 N40fe841002e64b96a0d0f2c4cec2fcc5 schema:affiliation N6811805f431b4990b2ba92b3b4cc98c6
64 schema:familyName Sakakibara
65 schema:givenName Junichi
66 rdf:type schema:Person
67 N6811805f431b4990b2ba92b3b4cc98c6 schema:name JFE Civil Engineering and Construction, 2-17-4 Kuramae, Taito-ku, 111-0051, Tokyo, Japan
68 rdf:type schema:Organization
69 N6f2119a07a60462a9e6d6cdf18f6c678 schema:affiliation https://www.grid.ac/institutes/grid.482819.e
70 schema:familyName Takanashi
71 schema:givenName Mamoru
72 rdf:type schema:Person
73 N777613ea4bfa43dba4a1f5d115613aff schema:affiliation https://www.grid.ac/institutes/grid.26999.3d
74 schema:familyName Park
75 schema:givenName Jin-Oh
76 rdf:type schema:Person
77 N91f02d0fd5ec453fb10930fcab277b5f rdf:first N1240c02e867f44c28a54d4d5a3bf4f34
78 rdf:rest N9dba0ca0d7774cac8b0dda37025c1a2b
79 N9dba0ca0d7774cac8b0dda37025c1a2b rdf:first N777613ea4bfa43dba4a1f5d115613aff
80 rdf:rest N3f0579d5742d4feb91355d27a7c5da6f
81 Nba15221c9ba24fb6a85d5f3751bb8b17 schema:volumeNumber 71
82 rdf:type schema:PublicationVolume
83 Ne206e1e329044daa817153f813778274 schema:name dimensions_id
84 schema:value pub.1112896047
85 rdf:type schema:PropertyValue
86 Nf6e1ccce992747b88b8ce38de5f784a5 schema:name doi
87 schema:value 10.1186/s40623-019-1011-0
88 rdf:type schema:PropertyValue
89 anzsrc-for:04 schema:inDefinedTermSet anzsrc-for:
90 schema:name Earth Sciences
91 rdf:type schema:DefinedTerm
92 anzsrc-for:0404 schema:inDefinedTermSet anzsrc-for:
93 schema:name Geophysics
94 rdf:type schema:DefinedTerm
95 sg:grant.7523281 http://pending.schema.org/fundedItem sg:pub.10.1186/s40623-019-1011-0
96 rdf:type schema:MonetaryGrant
97 sg:journal.1294798 schema:issn 1343-8832
98 1880-5981
99 schema:name Earth, Planets and Space
100 rdf:type schema:Periodical
101 sg:pub.10.1007/s10950-007-9080-0 schema:sameAs https://app.dimensions.ai/details/publication/pub.1039301593
102 https://doi.org/10.1007/s10950-007-9080-0
103 rdf:type schema:CreativeWork
104 sg:pub.10.1186/s40623-015-0201-7 schema:sameAs https://app.dimensions.ai/details/publication/pub.1046087386
105 https://doi.org/10.1186/s40623-015-0201-7
106 rdf:type schema:CreativeWork
107 sg:pub.10.1186/s40623-018-0803-y schema:sameAs https://app.dimensions.ai/details/publication/pub.1101084653
108 https://doi.org/10.1186/s40623-018-0803-y
109 rdf:type schema:CreativeWork
110 https://doi.org/10.1016/j.egypro.2014.11.666 schema:sameAs https://app.dimensions.ai/details/publication/pub.1014159937
111 rdf:type schema:CreativeWork
112 https://doi.org/10.1016/j.tecto.2008.05.037 schema:sameAs https://app.dimensions.ai/details/publication/pub.1005489767
113 rdf:type schema:CreativeWork
114 https://doi.org/10.1017/cbo9781139168359 schema:sameAs https://app.dimensions.ai/details/publication/pub.1098663240
115 rdf:type schema:CreativeWork
116 https://doi.org/10.1029/2001jb001664 schema:sameAs https://app.dimensions.ai/details/publication/pub.1028462591
117 rdf:type schema:CreativeWork
118 https://doi.org/10.1029/2004jb003329 schema:sameAs https://app.dimensions.ai/details/publication/pub.1019041319
119 rdf:type schema:CreativeWork
120 https://doi.org/10.1126/science.1074111 schema:sameAs https://app.dimensions.ai/details/publication/pub.1062446749
121 rdf:type schema:CreativeWork
122 https://doi.org/10.1126/science.1110489 schema:sameAs https://app.dimensions.ai/details/publication/pub.1062452050
123 rdf:type schema:CreativeWork
124 https://doi.org/10.1145/272991.272995 schema:sameAs https://app.dimensions.ai/details/publication/pub.1012259932
125 rdf:type schema:CreativeWork
126 https://doi.org/10.2965/jswe.24.35 schema:sameAs https://app.dimensions.ai/details/publication/pub.1001950216
127 rdf:type schema:CreativeWork
128 https://doi.org/10.2965/jswe1978.10.470 schema:sameAs https://app.dimensions.ai/details/publication/pub.1039076983
129 rdf:type schema:CreativeWork
130 https://doi.org/10.5026/jgeography.93.3_119 schema:sameAs https://app.dimensions.ai/details/publication/pub.1003955503
131 rdf:type schema:CreativeWork
132 https://doi.org/10.9749/jin.115.11 schema:sameAs https://app.dimensions.ai/details/publication/pub.1074146752
133 rdf:type schema:CreativeWork
134 https://www.grid.ac/institutes/grid.26999.3d schema:alternateName University of Tokyo
135 schema:name Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, 277-8564, Kashiwa-shi, Chiba, Japan
136 rdf:type schema:Organization
137 https://www.grid.ac/institutes/grid.412785.d schema:alternateName Tokyo University of Marine Science and Technology
138 schema:name Academic Assembly, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, 108-8477, Tokyo, Japan
139 rdf:type schema:Organization
140 https://www.grid.ac/institutes/grid.482819.e schema:alternateName Japan Oil Gas and Metals National Corporation (Japan)
141 schema:name Japan Oil, Gas and Metals National Corporation, 2-10-1 Toranomon, Minato-ku, 105-0001, Tokyo, Japan
142 rdf:type schema:Organization
 




Preview window. Press ESC to close (or click here)


...