Earthquake with magnitude of Md 2.1 on date 13-05-1987 and time 11:26:16 (Italy) in region 5 km SW Monghidoro (BO)

A magnitude Md 2.1 earthquake occured in region: 5 km SW Monghidoro (BO), on

  • 13-05-1987 09:26:16 (UTC)
  • 13-05-1987 11:26:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.19, 11.28 at 12 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
Monghidoro BO 5 3749 3749
San Benedetto Val di Sambro BO 5 4315 8064
Loiano BO 10 4294 12358
Monzuno BO 10 6328 18686
Castiglione dei Pepoli BO 11 5648 24334
Firenzuola FI 11 4726 29060
Grizzana Morandi BO 13 3916 32976
Camugnano BO 15 1885 34861
Vergato BO 17 7639 42500
Vernio PO 18 6060 48560
Marzabotto BO 18 6779 55339
Castel del Rio BO 18 1246 56585
Monterenzio BO 18 6035 62620
Castel di Casio BO 20 3448 66068

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km S of Bologna (386663 inhabitants)
37 Km NE of Prato (191150 inhabitants)
39 Km W of Imola (69797 inhabitants)
40 Km NE of Pistoia (90315 inhabitants)
47 Km N of Firenze (382808 inhabitants)
48 Km N of Scandicci (50609 inhabitants)
49 Km W of Faenza (58541 inhabitants)
58 Km SE of Modena (184973 inhabitants)
61 Km W of Forlì (117913 inhabitants)
73 Km NE of Lucca (89046 inhabitants)
73 Km SE of Carpi (70699 inhabitants)
77 Km SE of Reggio nell'Emilia (171345 inhabitants)
77 Km SW of Ferrara (133155 inhabitants)
77 Km W of Cesena (96758 inhabitants)
78 Km W of Ravenna (159116 inhabitants)
88 Km NE of Pisa (89158 inhabitants)
90 Km E of Viareggio (62467 inhabitants)
92 Km E of Massa (69479 inhabitants)
94 Km NW of Arezzo (99543 inhabitants)
95 Km E of Carrara (63133 inhabitants)
97 Km N of Siena (53903 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 2.1 1987-05-13
09:26:16
44.19 11.28 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 46969
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-13 09:26:16 ± 0.461
Latitude 44.19 ± 0.09
Longitude 11.28 ± 0.12
Depth (km) 11 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 46969

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) 13653.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 339
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00397
Epicentral distance of station farthest from the epicenter (degree) 0.01238
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 46969
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:46:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-05-13T09:27:00.50 10.0 undecidable manual SN 119 0.0124 0.46 0.1
--.CRE.Z. 1987-05-13T09:26:42.50 10.0 undecidable manual SG 139 0.0066 -0.29 0.5
--.ARV.Z. 1987-05-13T09:26:41.50 10.0 undecidable manual PN 119 0.0124 -0.32 0.8
--.PGD.Z. 1987-05-13T09:26:33.00 10.0 undecidable manual SG 134 0.004 -0.17 0.7
--.CRE.Z. 1987-05-13T09:26:32.00 10.0 undecidable manual PG 139 0.0066 0.14 2
--.PGD.Z. 1987-05-13T09:26:26.50 10.0 undecidable manual PG 134 0.004 0.19 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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