ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.0 on date 07-07-1987 and time 20:11:35 (Italy) in region 1 km E Badia Tedalda (AR)

A magnitude Md 2.0 earthquake occured in region: 1 km E Badia Tedalda (AR), on

  • 07-07-1987 18:11:35 (UTC)
  • 07-07-1987 20:11:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.71, 12.2 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Badia Tedalda AR 1 1087 1087
Sestino AR 8 1355 2442
Borgo Pace PU 10 606 3048
Casteldelci RN 10 407 3455
Mercatello sul Metauro PU 13 1378 4833
Pennabilli RN 13 2869 7702
Pieve Santo Stefano AR 13 3183 10885
Carpegna PU 14 1674 12559
Belforte all'Isauro PU 14 769 13328
Frontino PU 16 293 13621
Sansepolcro AR 16 15884 29505
Sant'Agata Feltria RN 17 2151 31656
Piandimeleto PU 18 2167 33823
San Giustino PG 18 11297 45120
Sant'Angelo in Vado PU 18 4133 49253
Pietrarubbia PU 18 660 49913
Verghereto FC 18 1907 51820
Caprese Michelangelo AR 19 1426 53246
Lunano PU 20 1527 54773
Montecopiolo PU 20 1128 55901

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NE of Arezzo (99543 inhabitants)
48 Km S of Cesena (96758 inhabitants)
49 Km SW of Rimini (147750 inhabitants)
59 Km S of Forlì (117913 inhabitants)
62 Km W of Pesaro (94582 inhabitants)
68 Km W of Fano (60888 inhabitants)
69 Km N of Perugia (166134 inhabitants)
69 Km SE of Faenza (58541 inhabitants)
76 Km E of Firenze (382808 inhabitants)
79 Km S of Ravenna (159116 inhabitants)
82 Km SE of Imola (69797 inhabitants)
82 Km E of Scandicci (50609 inhabitants)
82 Km NE of Siena (53903 inhabitants)
91 Km E of Prato (191150 inhabitants)
93 Km NW of Foligno (57155 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 2.0 1987-07-07
18:11:35
43.71 12.2 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 51209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-07-07 18:11:35 ± 0.189
Latitude 43.71 ± 0.03
Longitude 12.20 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 51209

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 4138.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.00648
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 51209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:49:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-07-07T18:11:57.90 10.0 undecidable manual SG 110 0.0052 0.78 0.2
--.PGD.Z. 1987-07-07T18:11:50.74 10.0 undecidable manual SG 295 0.0034 0.66 0.3
--.ASS.Z. 1987-07-07T18:11:50.16 10.0 undecidable manual PG 152 0.0065 -0.23 1.5
--.ARV.Z. 1987-07-07T18:11:47.50 10.0 undecidable manual PG 110 0.0052 -0.16 1.9
--.SS9.Z. 1987-07-07T18:11:47.97 10.0 undecidable manual SG 310 0.0029 -0.35 0.7
--.PGD.Z. 1987-07-07T18:11:44.51 10.0 undecidable manual PG 295 0.0034 0.45 1.3
--.SS9.Z. 1987-07-07T18:11:42.54 10.0 undecidable manual PG 310 0.0029 -0.51 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download