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Seismic

  SEISMIC      
Attribute Attribute Name Description Format Units
         
Event Data from Network        
sd_evn_id seismic data ID An identifier for linking with other tables autonumber  
sn_net_id network id An identifier for linking with the network information mediumint  
sd_evn_eventid Event identifier The event identifier used by observatory text  
sd_evn_arch seismogram archive Location of seismogram archive text  
sd_evn_stime_utc Event time UTC Event time (UTC) stored as datetime (YYYY-MM-DD hh:mm:ss). datetime  
sd_evn_elat Estimated latitude Estimated latitude of the seismic event (positive = N) sxx.xxxxxxx deg lat
sd_evn_elon Estimated longitude Estimated longitude of the seismic event (Positive = E) sxxx.xxxxxxx deg long
sd_evn_datum Datum The datum used for the longitude and latitude. varchar(30)  
sd_evn_edep Estimated depth Estimated depth of the seismic event xxx.x km
sd_evn_totsta Total number of stations Total number of stations used for location mediumint  
sd_evn_numphas Number of phases Number of phases used for location mediumint  
sd_evn_azgap Azimuthal gap Azimuthal gap xxx deg 0-360
sd_evn_dcs Distance to closest station Distance to closest station (km) xx.x km
sd_evn_rms Rms Rms (root mean square) time error (sec), which provides a measure of the location quality. xx.xx sec
sd_evn_herr Horizontal error Horizontal error xx.xxx km
sd_evn_derr Depth error Depth error xx.xxx km
sd_evn_locqual Location quality The quality of the calculated location. The quality marker will be defined by WOVOdat. text  
sd_evn_pmag Primary Magnitude Primary Magnitude x.x M
sd_evn_pmag_type Primary Magnitude type Primary Magnitude type text  
sd_evn_smag Secondary Magnitude secondary M, where given x.x M
sd_evn_smag_type Secondary Magnitude type secondary Magnitude type text  
sd_evn_coda Coda duration Coda duration xxx sec
sd_evn_eqtype Earthquake type (WOVOdat terminol) Earthquake type (WOVOdat terminol) text  
sd_evn_eqtype_org Earthquake type (original terminol) Earthquake type (original terminology - VT, LP, Ex; A,B,C; HF, LF; other) text  
sd_evn_wave_prox Proximal waveform Waveform recorded at stn <2 km from vent for representative events only. digital waveform  
sd_evn_wave_int Intermediate waveform Waveform recorded at stn 2-5 km from vent for representative events only. digital waveform  
sd_evn_wave_dis Distal waveform Waveform recorded at stn >5 km from vent for representative events only. digital waveform  
sd_evn_mten_mxx Moment tensor m_xx Moment tensor m_xx float  
sd_evn_mten_mxy Moment tensor m_xy Moment tensor m_xy float  
sd_evn_mten_mxz Moment tensor m_xz Moment tensor m_xz float  
sd_evn_mten_myy Moment tensor m_yy Moment tensor m_yy float  
sd_evn_mten_myz Moment tensor m_yz Moment tensor m_yz float  
sd_evn_mten_mzz Moment tensor m_zz Moment tensor m_zz float  
sd_evn_strk1 Strike 1 of best double couple Strike 1 of best double couple xxx deg 0-360
sd_evn_dip1 Dip 1 of best double couple Dip 1 of best double couple xx deg 0-90
sd_evn_rak1 Rake 1 of best double couple Rake 1 of best double couple xx deg 0-90
sd_evn_strk2 Strike 2 of best double couple Strike 2 of best double couple xxx deg 0-360
sd_evn_dip2 Dip 2 of best double couple Dip 2 of best double couple xx deg 0-90
sd_evn_rak2 Rake 2 of best double couple Rake 2 of best double couple xx deg 0-90
sd_evn_foc Focal plane solution Focal plane solution - beachball, w/ arrivals image  
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_evn_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
         
Intensity Table        
sd_int_id intensity id An identifier for linking with other tables mediumint  
vd_vol_id volcano id An identifier for linking to the volcano information. mediumint  
sd_int_time_utc time utc Approximate time of event (UTC) stored as YYYY-MM-DD hh:mm:ss. datetime  
sd_evn_eventid probable event ID This is the probable event identifier for linking with the event table. autonumber  
sd_int_city city The name of the city or town where the event was felt text  
sd_int_radfr Max distance, felt Max distance at which eq was felt, measured from epicenter xxx km
sd_int_max_rint Maximum reported intensity Maximum reported intensity (modified mercalli intensity). x MMI
sd_int_dist_max_rint Distance at max reported intensity Distance at max reported intensity xxx km
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_int_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
         
Event data from single station        
sd_evs_id event data id An identifier for linking with other tables autonumber  
ss_id station id An identifier for linking with the station information mediumint  
sd_evs_stime_utc Event time utc Event start time (UTC) stored as datetime YYYY-MM-DD hh:mm:ss datetime  
sd_evs_dist_actven Distance from active vent The distance from where the event was felt to the active vent. Calculated from other data in database. xx.x km
sd_evs_maxamptrac Max amplitude of trace Max amplitude of trace. Enter info only if whole system magnification is listed in station table. xx mm
sd_evs_codur coda duration coda duration xxx sec
sd_evs_fint felt intensity The reported intensity of the event. x MMI
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_evs_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
Tremor Information        
sd_trm_id tremor data id An identifier for linking with other tables autonumber  
sn_net_id network id An identifier for linking with the network information mediumint  
ss_id Station ID An identifier for linking with the station information. Enter station only if reports are from a single station. mediumint  
sd_trm_stime_utc Start time of tremor envelope (UTC) Start time (UTC) stored as datetime YYYY-MM-DD hh:mm:ss for individual envelope. The start and stop times are defined by the observatories. datetime  
sd_trm_ftime_utc Stop time of tremor envelope (UTC) Stop time (UTC) stored as datetime YYYY-MM-DD hh:mm:ss for individual envelope. The start and stop times are defined by the observatories. datetime  
sd_trm_tremdur Duration of tremor Duration of tremor xxx.x min
sd_trm_tremdur_day Tremor per day The duration of tremor for each day. xxxx min
sd_trm_qdepth Qualitative depth Deep, intermediate, shallow (S=0-2 km; I=2-10 km; D >10 km) text  
sd_trm_wave waveform sample Representative tremor waveform digital waveform  
sd_trm_domfreq1 Dominant frequency 1 Dominant frequency 1 (in Hz) xx.xx Hz
sd_trm_domfreq2 Dominant frequency 2 (if any) Dominant frequency 2 (if any, in Hz) xx.xx Hz
sd_trm_maxamptrem Maximum amplitude of tremor Maximum amplitude of tremor (refer to the station table for gain information). xx mm
sd_trm_minamptrem Minimum amplitude of tremor Minimum amplitude of tremor - the noise level. xx mm
sd_trm_desc Description of tremor (banded, etc) Description of tremor (banded, etc) text  
sd_trm_visact Associated visible activity (desc) Associated visible activity (desc) text  
sd_trm_reddis RD Reduced displacement - >5km from source preferred, for geometrical spreading xx cm2
sd_trm_rderr RD Error The reduced displacement error xx cm2
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_trm_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
         
Interval data, including swarms        
sd_int_id interval data id An identifier for linking with other tables autonumber  
sn_net_id network id An identifier for linking with the network information mediumint  
ss_id Station ID The identifier for linking with the station table. Enter only if a single station was used for counts. mediumint  
sd_int_stime_utc interval start time UTC The start time (UTC) of this interval based on instrument recordings stored as datetime YYYY-MM-DD hh:mm:ss. datetime  
sd_int_ftime_utc interval stop time UTC The stop time (UTC) of this interval based on instrument recordings stored as datetime YYYY-MM-DD hh:mm:ss. datetime  
sd_int_nrec recorded number of earthquakes The recorded earthquake count during the specified time interval. xxxxxx  
sd_int_nfelt number of felt earthquakes Number of felt earthquakes for this interval. xxxx  
sd_int_felt_stime_utc Earthquake counts felt start time Felt arthquake counts measurement start time (UTC) stored as YYYY-MM-DD hh:mm:ss datetime  
sd_int_felt_ftime_utc Earthquake counts felt stop time Felt arthquake counts measurement stop time (UTC) stored as YYYY-MM-DD hh:mm:ss datetime  
sd_int_totale Total seismic E release (seismic moment) Total seismic E release (seismic moment) for this swarm interval   erg^-0.5
sd_int_totale_open_utc Seismic E window opens Total seismic E release (seismic moment) measurement start time (UTC) stored as YYYY-MM-DD hh:mm:ss. Might not be the same time period as for felt earthquakes. datetime  
sd_int_totale_close_utc Seismic E window closes Total seismic E release (seismic moment) measurement stop time (UTC) stored as YYYY-MM-DD hh:mm:ss. Might not be the same time period as for felt earthquakes. datetime  
sd_int_vmigr_hyp Vertical Migration of hypocenters The vertical migration of hypocenters (in km use + for up, - for down) sxx.x km
sd_int_hdist Horizontal Distance Horizontal Distance from summit to swarm center xx.x km
sd_int_hmigr_hyp Horizontal migration of hypocenters Horizontal migration of hypocenters from/to the summit (positive = outward). sxx.x km
sd_int_patt Temporal pattern of swarm Temporal pattern of swarm (using one of the WOVOdat defined patterns). A,B,C…  
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_int_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
RSAM Table        
sd_rsm_id RSAM id An identifier for linking with other tables autonumber  
ss_id Station ID An identifier for linking with the seismic station table mediumint  
sd_rsm_count RSAM count RSAM count during this interval. RSAM units from a single station can be compared for various intervals xxxxx RSAM units
sd_rsm_stime_utc RSAM time UTC RSAM report time (UTC) stored as YYYY-MM-DD hh:mm:ss. datetime  
sd_rsm_intv RSAM interval time The RSAM interval time xxx.x min
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_rsm_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
SSAM Table        
sd_ssm_id SSAM id An identifier for linking with other tables autonumber  
ss_id Station ID An identifier for linking with the seismic station table mediumint  
sd_ssm_02hz SSAM count, 0-2Hz SSAM counts in 0-2Hz spectral band. SSAM units from single station can be compared for various intervals. xxxxx SSAM units
sd_ssm_510hz SSAM count, 5-10 Hz SSAM count in 5-10 Hz spectral band xxxxx SSAM units
sd_ssm_stime_utc SSAM report time (UTC) The SSAM report time (UTC) stored as YYYY-MM-DD hh:mm:ss. datetime  
sd_ssm_intv SSAM interval time The SSAM interval time xxx.x min
cc_id2 Collector ID An identifier for linking to data collector information. mediumint  
sd_ssm_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
Network Table        
sn_net_id network id An identifier for linking with other tables autonumber  
sn_net_name network name The name of the network text  
vd_vol_id volcano id An identifier for linking to the volcano information. autonumber  
sn_net_vmodel Velocity model A cross section image of the velocity model for the network. Can be simple layered model or more complex variation in x-z space. image  
sn_net_desc description A description of the network varchar(255)  
sn_net_comm comments Comments on about the network varchar(255)  
sn_net_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
Seismic Station Table        
ss_id station table ID An identifier for linking with other tables. autonumber  
sn_net_id Network ID An identifier for linking with the network table. mediumint  
ss_nam station name The name of the station text  
ss_nlat latitude The latitude of the station sxx.xxxxxxx deg lat
ss_nlon longitude The longitude of the station sxxx.xxxxxxx deg long
ss_datum Datum The datum used for the longitude and latitude. varchar(30)  
ss_nelev elevation The nominal elevation of the station ("s" = sign; positive, above sea level). sxxxx m
ss_est_utc start date The date the station was set up and activated (UTC) stored as YYYY-MM-DD hh:mm:ss. datetime  
ss_dest_utc stop date The date the station was permanently decommissioned (UTC) stored as YYYY-MM-DD hh:mm:ss. See observatory for station operation history. datetime  
ss_utc difference from UTC Time zone relative to UTC - "s" = sign; read as GMT +- xx h. sxx.x  
ss_desc Station description A description of the station. varchar(255)  
ss_gain System gain Total gain from seismometer, telemetry, and recorder. Please refer to the observatory for information on gain updates.   (times)
sd_rsm_rscalib RSAM Calibration (if any) Reduced Displacement per 100 RSAM counts xxx.xx cm2
sd_rsm_sscalib_02hz SSAM Calibration, 0-2 Hz (if any) Reduced Displacement per 100 SSAM counts, 0-2 Hz xxx.xx cm2
sd_rsm_sscalib_510hz SSAM Calibration, 5-10 Hz (if any) Reduced Displacement per 100 SSAM counts, 5-10 Hz xxx.xx cm2
cc_id Contact ID An identifier for linking to contact information. mediumint  
ss_comm Comments Comments about the station including information about status. varchar(255)  
ss_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         
Earthquake Translation Table   To translate from local eq terminology to WOVOdat terminology    
st_eqtr_id translation id An identifier for linking with other tables. autonumber  
st_eqtr_org original term The original terminology. text  
st_eqtr_wovo WOVOdat term WOVOdat terminology. text  
st_eqtr_desc description Description of terminology. text  
st_eqtr_loaddate Load date The date this row was entered datetime  
cc_id_load Data loader ID The id linking to the person who entered this row of data mediumint  
         

Last Updated on 1/12/2004
By chris newhall