Earthquake with magnitude of Md 2.4 on date 17-10-1987 and time 11:43:02 (UTC) in region 3 km SE Cerreto di Spoleto (PG)

A magnitude Md 2.4 earthquake occured in region: 3 km SE Cerreto di Spoleto (PG), on

  • 17-10-1987 11:43:02 (UTC)
  • 17-10-1987 12:43:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8, 12.95 at 5 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
Cerreto di Spoleto PG 3 1075 1075
Vallo di Nera PG 8 364 1439
Sellano PG 10 1079 2518
Poggiodomo PG 10 117 2635
Cascia PG 11 3217 5852
Preci PG 11 724 6576
Norcia PG 12 4957 11533
Sant'Anatolia di Narco PG 12 564 12097
Scheggino PG 14 461 12558
Campello sul Clitunno PG 14 2442 15000
Monteleone di Spoleto PG 17 599 15599
Visso MC 18 1107 16706
Trevi PG 19 8469 25175
Spoleto PG 19 38218 63393
Castelsantangelo sul Nera MC 19 281 63674

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SE of Foligno (57155 inhabitants)
37 Km NE of Terni (111501 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
62 Km NW of L'Aquila (69753 inhabitants)
64 Km W of Teramo (54892 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
94 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
Rev 1000 Md 2.4
ML-VAX 1.6
1987-10-17
11:43:02
42.81 12.95 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 57119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-17 11:43:02 ± 0.29
Latitude 42.81 ± 0.01
Longitude 12.95 ± 0.02
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 57119

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) 1807
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.003
Epicentral distance of station farthest from the epicenter (degree) 0.0123
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 57119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:54:47

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 57119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SS9.Z. 1987-10-17T11:43:46.15 10.0 undecidable manual SN 324 0.0123 -0.36 0.5
--.SDI.Z. 1987-10-17T11:43:44.20 10.0 undecidable manual SN 149 0.0113 0.22 0.6
--.CRE.Z. 1987-10-17T11:43:40.62 10.0 undecidable manual SN 318 0.0098 0.75 0.3
--.CP9.Z. 1987-10-17T11:43:35.00 10.0 undecidable manual SG 179 0.0084 -0.2 0.7
--.ARV.Z. 1987-10-17T11:43:28.20 10.0 undecidable manual SG 359 0.0062 1 0.2
--.SS9.Z. 1987-10-17T11:43:26.87 10.0 undecidable manual PN 324 0.0123 -0.89 0.4
--.SDI.Z. 1987-10-17T11:43:26.80 10.0 undecidable manual PN 149 0.0113 0.5 1.1
--.CRE.Z. 1987-10-17T11:43:23.98 10.0 undecidable manual PN 318 0.0098 0.05 1.7
--.CP9.Z. 1987-10-17T11:43:22.00 10.0 undecidable manual PG 179 0.0084 0.76 0.7
--.AM8.Z. 1987-10-17T11:43:20.48 10.0 undecidable manual PG 32 0.0079 0.38 1.5
--.CM8.Z. 1987-10-17T11:43:19.47 10.0 undecidable manual SG 19 0.0037 1.25 0.1
--.ALP.Z. 1987-10-17T11:43:19.17 10.0 undecidable manual SG 92 0.004 -0.28 1
--.ARV.Z. 1987-10-17T11:43:16.10 10.0 positive manual PG 359 0.0062 -0.52 2.6
--.ASS.Z. 1987-10-17T11:43:15.56 10.0 undecidable manual SG 319 0.003 0.25 0.7
--.CM8.Z. 1987-10-17T11:43:11.15 10.0 undecidable manual PG 19 0.0037 -0.28 1.7
--.ALP.Z. 1987-10-17T11:43:11.60 10.0 undecidable manual PG 92 0.004 -0.54 1.2
--.ASS.Z. 1987-10-17T11:43:09.78 10.0 undecidable manual PG 319 0.003 0.03 2
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