Seismicity in Pennsylvania and the Pennsylvania State...

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Seismicity in Pennsylvania and the Pennsylvania State Seismic Network (PASEIS) Andy Nyblade and Kyle Homman Department of Geosciences, Penn State University April 4, 2017 PresentaIon made to the Geophysical Society of PiJsburgh

Transcript of Seismicity in Pennsylvania and the Pennsylvania State...

Page 1: Seismicity in Pennsylvania and the Pennsylvania State ...paseis.geosc.psu.edu/Report/GSP_PASEIS_4_4_17_final.pdfSeismicity in Pennsylvania and the Pennsylvania State Seismic Network

SeismicityinPennsylvaniaandthePennsylvaniaStateSeismicNetwork

(PASEIS)

AndyNybladeandKyleHommanDepartmentofGeosciences,PennStateUniversity

April4,2017PresentaIonmadetotheGeophysicalSocietyofPiJsburgh

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IntroducIon

•  ReviewofseismicityinPA•  ReviewofseismicnetworksinPA•  SeismicityinPennsylvania2013-2015•  BuildingthePennsylvaniaStateSeismicNetwork(PASEIS)

•  EventdetecIonandlocaIon•  PASEISwebsite

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Earthquake locations by the Lamont Cooperative Seismographic Network, US Geological Survey and the Geological Survey of Canada.

June 2010, Won-Young Kim, Lamont-Doherty Earth Observatory of Columbia University, <www.ldeo.columbia.edu/LCSN>.

Earthquakes in NE United States and Canada 1990 - 2010

84˚W 80˚W 76˚W 72˚W 68˚W 64˚W

36˚N

38˚N

40˚N

42˚N

44˚N

46˚N

48˚N

50˚NEarthquakesSeismographic stations

5 4 3 2 1

Earthquakemagnitudes

0 200 400 600 km

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www.earthinsItute.columbia.edu/news/2004/story04-30-04b.html)

ArmbrusterandSeeber(1987)

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PermanentseismicstaIonsinPAthrough2015•  USGSNaIonalNetwork(2staIons)•  LamontDohertyEarthObservatoryCooperaIveSeismic

Network(LCSN)(supportedasaregionalnetworkbytheUSGS)(6staIons)

•  IniIal10PASEISstaIonsUSGSandLCSNStaIons

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HistoryofbuildingaPAstateseismicnetwork•  2006-2009Establishmentofthefirst6permanentPASEISstaIons–

DCNR(dataarchivedanddistributedusingthePENetworkcode)•  2009CarbonsequestraIontechnicalassessment-DCNR

–  25portableseismicsta0ons•  2010Purchaseof4USArraystaIonsfromIRIS–DCNR•  2013EarthquakemonitoringduringUSArray-DCNR

–  SupportfortemporarynetworktodensifytheUSArraynetwork,developseismicitycatalog

•  2015Expandthe10-staIonpermanentnetworkto30staIonsandprovideseismiceventinformaIon–DCNRandDEP

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USArray

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StaIons2/2013to6/2015

•  1013-componenthighquality(broadband)staIons

•  RecordingconInuously

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ERPAL53A

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PAseismicity2/2013to06/2015(fromKyleHomman’sMSthesis,PSU)

•  AveragenumberofstaIonsusedforeachevent:10

•  MinimumnumberofstaIonsusedwas4•  1761eventswith1544locatedinPennsylvania

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Historical�80˚

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MagnitudesandDepths•  Local

magnitudesrangefrom1.0to2.9

•  Depthsmostly

<1km

Catalogiscompletetomagnitude1.8

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MineorQuarryBlasts

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Non-miningevents

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AretherespaIalandtemporalcorrelaIonswithwellacIvity?

Non-miningeventsProducIonwells(2013/2015)InjecIonwells

-Nocorrela<onhasbeenfoundwitheitherinjec<onwellsorfrackedwellsforthe2013-2015<meperiod

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Summaryoffindings:1530miningrelatedevents14Non-miningevents–theyareallprobablytectonicearthquakes

Historical 2/2013-6/2015

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PASEIS Station Map Sept. 2016

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Equipment

•  GuralpCMG3Tseismometer•  NanometricsCompactTrilliumseismometer

RefTekRT130Datalogger

GPSClock

Broadband3-componentseismometers

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Basementdeployments–mostlyatuniversitylocaIons

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Outsidevaultdeployments–mostlyatstateparklocaIons

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TechnicalspecificaIons;Networkcode=PE

hCp://ds.iris.edu/mda/PE

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Overviewofnetwork

ListofstaIonnames,locaIons,andstartImes

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Informa<ononhowtorequestthedata

Viewsomeofthedata

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OpenbroadbandseismicstaIonsinPAwithnearreal-Imetelemetry•  30staIonsinthePASEISnetwork•  6staIonsoperatedbyLCSN(LD)•  2staIonsoperatedbytheUSGS(US)•  4staIonsintheCEUSNnetworkoperatedbyIRIS/USGS

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IUPA

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Sta<onsusedtodetectandlocateseismiceventsbyPASEIS(71total)

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EarthwormProcess

•  AutomaIcdetecIonandlocaIonofseismicevents– ArrivalImepicks(PandSwaves)•  STA/LTAalgorithm•  Frequencybandalgorithm

– LocaIon•  HYPOINVERSEcodewithvelocitymodelforPA

•  Alerts– RecordseventinformaIonandsendsemailalerts

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AnalysisofAutoma<cLoca<ons

•  DeterminewhetheraneventisrealorafalsedetecIon– UseinformaIononemailalert

• WaveformcharacterisIcs•  LocaIonofstaIons•  LocaIonofevent(neartoknownmine?)

•  IfthereisanyindicaIonthattheeventmightnotbeafalsedetecIon,thentheeventismanuallyrelocated

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ManualEventLoca<ons

•  PulldatafromEarthwormserver•  RefinearrivalImepicksbyhandusingSEISAN•  RelocateeventusingHYPOINVERSEandsamevelocitymodelasusedforautomaIcsoluIon

•  AddeventinformaIontodatabaseandpostonthewebsite

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ExampleP-andS-wavearrivalImepicksfromSEISAN

Pwave

Swave

VerIcalComponent

North-SouthComponent

East-WestComponent

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EmailAlertreceivedforMagnitude2.2earthquakenearTitusvillePAonApril18,2016

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-0.4-0.20.00.2 Pennsylvania

PACH HHZAPR 18 (109), 201610:34:41.000

-0.4-0.20.00.2 Pennsylvania

PACH HHEAPR 18 (109), 201610:34:41.000

-0.4-0.20.00.2 Pennsylvania

PACH HHNAPR 18 (109), 201610:34:41.000

0 5 10 15 20 25Time (s)

Dis

plac

emen

t (m

icro

ns)

PACH

Whatdothedatalooklike?(ChapmanStatePark)

Magnitude2.2Time:2016/04/1806:34:40localDepth3.3miles(5.2km)NearTitusville,PA

Pwave

Swave

VerIcal

East-west

North-south

1micron=0.001millimeterFigurecourtesyofC.Ammon

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ExampleofanEmailalertforaTeleseismicearthquake(adistant,M>5earthquake)

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ExampleofanEmailalertforafalsedetecIononculturalnoise(mostalertslooklikethis!)

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ExampleEmailalertforaminingblast.NotecharacterisIclongperiodsurfacewave.

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EmailalertforoneoftheLawrenceCountyeventsonApril25,2016.

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(hJp://paseis.geosc.psu.edu)

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AcknowledgmentsSupportforPASEIScomesfromDCNR(BureauofTopographicandGeologicSurvey)andDEP

IRISprovidesdatamanagement(dataarchivinganddistribuIon)

2/13/11 4:16 PMNSF_Logo.jpg 692×692 pixels

Page 1 of 1http://upload.wikimedia.org/wikipedia/commons/0/03/NSF_Logo.jpg