Earthquake with magnitude of Md 2.1 on date 23-03-1990 and time 21:53:54 (Italy) in region 9 km W Monte Cavallo (MC)

A magnitude Md 2.1 earthquake occured in region: 9 km W Monte Cavallo (MC), on

  • 23-03-1990 20:53:54 (UTC)
  • 23-03-1990 21:53:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.98, 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
Monte Cavallo MC 9 145 145
Sellano PG 11 1079 1224
Serravalle di Chienti MC 12 1070 2294
Valtopina PG 14 1398 3692
Pieve Torina MC 15 1458 5150
Foligno PG 15 57155 62305
Trevi PG 16 8469 70774
Preci PG 17 724 71498
Nocera Umbra PG 17 5839 77337
Muccia MC 17 915 78252
Visso MC 17 1107 79359
Spello PG 18 8645 88004
Fiordimonte MC 18 202 88206
Cerreto di Spoleto PG 18 1075 89281
Pievebovigliana MC 19 866 90147
Sefro MC 19 422 90569
Campello sul Clitunno PG 20 2442 93011

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
43 Km E of Perugia (166134 inhabitants)
51 Km NE of Terni (111501 inhabitants)
76 Km W of Teramo (54892 inhabitants)
81 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
97 Km S of Fano (60888 inhabitants)
98 Km SE 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
Rev 1000 Md 2.1 1990-03-23
20:53:54
42.98 12.89 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 112739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-03-23 20:53:54 ± 0.091
Latitude 42.98 ± 0.01
Longitude 12.89 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 112739

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) 824.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.0055
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 112739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:44:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1990-03-23T20:54:16.69 10.0 undecidable manual SG 194 0.0055 0.37 0.1
--.ARV.Z. 1990-03-23T20:54:13.49 10.0 undecidable manual SG 4 0.0046 0.18 0.3
--.MNS.Z. 1990-03-23T20:54:06.91 10.0 undecidable manual PG 194 0.0055 -0.27 0.5
--.ARV.Z. 1990-03-23T20:54:05.13 10.0 positive manual PG 4 0.0046 -0.31 1
--.CIO.Z. 1990-03-23T20:54:05.82 10.0 undecidable manual SG 40 0.0025 0.07 0.9
--.RM8.Z. 1990-03-23T20:54:03.89 10.0 undecidable manual SG 96 0.0021 -0.31 0.4
--.ASS.Z. 1990-03-23T20:54:02.80 10.0 undecidable manual SG 295 0.0017 0.06 0.6
--.CIO.Z. 1990-03-23T20:54:01.24 10.0 undecidable manual PG 40 0.0025 0.16 2.2
--.RM8.Z. 1990-03-23T20:54:00.28 10.0 undecidable manual PG 96 0.0021 0.09 2.7
--.ASS.Z. 1990-03-23T20:53:59.47 10.0 undecidable manual PG 295 0.0017 0.13 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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