Earthquake with magnitude of Md 2.2 on date 28-02-1986 and time 09:40:01 (Italy) in region 7 km SW Serravalle di Chienti (MC)

A magnitude Md 2.2 earthquake occured in region: 7 km SW Serravalle di Chienti (MC), on

  • 28-02-1986 08:40:01 (UTC)
  • 28-02-1986 09:40:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.04, 12.89 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
Serravalle di Chienti MC 7 1070 1070
Monte Cavallo MC 10 145 1215
Valtopina PG 11 1398 2613
Nocera Umbra PG 12 5839 8452
Pieve Torina MC 13 1458 9910
Sefro MC 13 422 10332
Muccia MC 14 915 11247
Pievebovigliana MC 16 866 12113
Fiordimonte MC 17 202 12315
Sellano PG 17 1079 13394
Foligno PG 17 57155 70549
Fiuminata MC 18 1402 71951
Pioraco MC 18 1134 73085
Spello PG 18 8645 81730
Camerino MC 18 6974 88704

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NE of Foligno (57155 inhabitants)
41 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
91 Km S of Fano (60888 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
97 Km S of Pesaro (94582 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 2.2 1986-02-28
08:40:01
43.04 12.89 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 23299
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-28 08:40:01 ± 0.662
Latitude 43.04 ± 0.03
Longitude 12.89 ± 0.07
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 23299

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) 6424.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 188
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00599
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 23299
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:25:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1986-02-28T08:40:19.80 10.0 undecidable manual SG 4 0.0041 1.7 0.2
--.MNS.Z. 1986-02-28T08:40:15.00 10.0 undecidable manual PG 193 0.006 0.21 1.7
--.ARV.Z. 1986-02-28T08:40:10.00 10.0 undecidable manual PG 4 0.0041 -1 1.2
--.ASS.Z. 1986-02-28T08:40:10.00 10.0 undecidable manual SG 278 0.0015 1.2 0.4
--.ASS.Z. 1986-02-28T08:40:04.70 10.0 undecidable manual PG 278 0.0015 -0.92 1.5
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