Earthquake with magnitude of Md 2.0 on date 18-09-1987 and time 04:49:24 (Italy) in region 4 km NW Serravalle di Chienti (MC)

A magnitude Md 2.0 earthquake occured in region: 4 km NW Serravalle di Chienti (MC), on

  • 18-09-1987 02:49:24 (UTC)
  • 18-09-1987 04:49:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1, 12.92 at 6 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
Serravalle di Chienti MC 4 1070 1070
Sefro MC 5 422 1492
Fiuminata MC 10 1402 2894
Pioraco MC 10 1134 4028
Muccia MC 10 915 4943
Nocera Umbra PG 11 5839 10782
Pieve Torina MC 12 1458 12240
Camerino MC 13 6974 19214
Monte Cavallo MC 14 145 19359
Pievebovigliana MC 14 866 20225
Valtopina PG 14 1398 21623
Fiordimonte MC 16 202 21825
Castelraimondo MC 16 4587 26412
Esanatoglia MC 17 2034 28446
Gualdo Tadino PG 18 15208 43654
Matelica MC 19 9981 53635
Gagliole MC 19 620 54255

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NE of Foligno (57155 inhabitants)
43 Km E of Perugia (166134 inhabitants)
64 Km NE of Terni (111501 inhabitants)
75 Km SW of Ancona (100861 inhabitants)
81 Km NW of Teramo (54892 inhabitants)
83 Km S of Fano (60888 inhabitants)
90 Km S of Pesaro (94582 inhabitants)
92 Km NW of L'Aquila (69753 inhabitants)
93 Km E of Arezzo (99543 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 2.0 1987-09-18
02:49:24
43.1 12.92 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 55589
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-18 02:49:24 ± 0.126
Latitude 43.10 ± 0.00
Longitude 12.92 ± 0.00
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 55589

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) 480.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 198
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.00356
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

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 55589
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-09-18T02:49:40.41 10.0 undecidable manual SG 2 0.0036 0.09 0.3
--.ARV.Z. 1987-09-18T02:49:33.75 10.0 undecidable manual PG 2 0.0036 -0.06 1
--.ASS.Z. 1987-09-18T02:49:33.00 10.0 undecidable manual SG 258 0.0018 0.07 0.5
--.CM8.Z. 1987-09-18T02:49:32.26 10.0 undecidable manual SG 60 0.0016 -0.11 0.5
--.CM8.Z. 1987-09-18T02:49:29.28 10.0 negative manual PG 60 0.0016 0.06 2.5
--.ASS.Z. 1987-09-18T02:49:29.50 10.0 undecidable manual PG 258 0.0018 -0.05 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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