Earthquake with magnitude of Md 1.9 on date 06-05-1987 and time 16:52:15 (Italy) in region 3 km E Giano dell'Umbria (PG)

A magnitude Md 1.9 earthquake occured in region: 3 km E Giano dell'Umbria (PG), on

  • 06-05-1987 14:52:15 (UTC)
  • 06-05-1987 16:52:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8420, 12.6110 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
Giano dell'Umbria PG 3 3846 3846
Castel Ritaldi PG 6 3278 7124
Montefalco PG 7 5679 12803
Gualdo Cattaneo PG 9 6155 18958
Massa Martana PG 10 3770 22728
Bevagna PG 10 5081 27809
Trevi PG 12 8469 36278
Campello sul Clitunno PG 14 2442 38720
Foligno PG 15 57155 95875
Collazzone PG 15 3473 99348
Spoleto PG 16 38218 137566
Cannara PG 17 4305 141871
Acquasparta TR 18 4778 146649
Spello PG 18 8645 155294
Todi PG 18 16851 172145
Fratta Todina PG 20 1839 173984

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Foligno (57155 inhabitants)
31 Km N of Terni (111501 inhabitants)
35 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
91 Km SE of Arezzo (99543 inhabitants)
92 Km W of Teramo (54892 inhabitants)
94 Km N of Guidonia Montecelio (88673 inhabitants)
99 Km N of Tivoli (56533 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
Bulletin
Rev1000
Md 1.9 1987-05-06
14:52:15
42.842 12.611 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 46429
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-06 14:52:15 ± 0.745
Latitude 42.8420 ± 0.0369
Longitude 12.6110 ± 0.0352
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 46429

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) 5003.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 281
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00623
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:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 46429
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:45:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ARV.Z. 1987-05-06T14:52:40.00 10.0 undecidable manual SG 20 0.6882 -0.27 0.5
--.CM8.Z. 1987-05-06T14:52:34.25 10.0 undecidable manual SG 47 0.5217 -0.41 0.7
--.ARV.Z. 1987-05-06T14:52:29.50 10.0 undecidable manual PG 20 0.6882 -0.46 1
--.CM8.Z. 1987-05-06T14:52:26.79 10.0 positive manual PG 47 0.5217 0.06 3
--.ASS.Z. 1987-05-06T14:52:25.10 10.0 undecidable manual SG 7 0.2109 0.17 0.6
--.PRG.Z. 1987-05-06T14:52:22.00 10.0 undecidable manual PG 328 0.2997 -0.6 1
--.ASS.Z. 1987-05-06T14:52:22.50 10.0 undecidable manual PG 7 0.2109 1.39 0.2
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download