Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.1 on date 25-07-1990 and time 13:22:20 (Italy) in region 3 km N Monte Cavallo (MC)

A magnitude Md 2.1 earthquake occured in region: 3 km N Monte Cavallo (MC), on

  • 25-07-1990 11:22:20 (UTC)
  • 25-07-1990 13:22:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0230, 12.9990 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.

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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 3 145 145
Pieve Torina MC 5 1458 1603
Serravalle di Chienti MC 7 1070 2673
Fiordimonte MC 8 202 2875
Muccia MC 8 915 3790
Pievebovigliana MC 8 866 4656
Visso MC 13 1107 5763
Fiastra MC 13 559 6322
Camerino MC 14 6974 13296
Ussita MC 14 444 13740
Acquacanina MC 14 121 13861
Sefro MC 14 422 14283
Sellano PG 16 1079 15362
Preci PG 16 724 16086
Pioraco MC 18 1134 17220
Bolognola MC 19 142 17362
Castelsantangelo sul Nera MC 19 281 17643
Fiuminata MC 19 1402 19045
Nocera Umbra PG 20 5839 24884

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
50 Km E of Perugia (166134 inhabitants)
59 Km NE of Terni (111501 inhabitants)
70 Km NW of Teramo (54892 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
91 Km S of Fano (60888 inhabitants)
99 Km S of Pesaro (94582 inhabitants)
99 Km NE of Viterbo (67173 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 2.1
ML-VAX 1.7 		1990-07-25
11:22:20		 43.023 12.999 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 123849
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-07-25 11:22:20 ± 0.134
Latitude 43.0230 ± 0.0072
Longitude 12.9990 ± 0.0109
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 123849

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) 1193.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.00615
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 123849
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:55:02

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 123849
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(km) Takeoff_angle Residual Weight
--.AOI.Z. 1990-07-25T11:22:44.90 10.0 undecidable manual SG 39 0.6882 0.79 0.1
--.MNS.Z. 1990-07-25T11:22:44.50 10.0 undecidable manual SG 200 0.6771 0.53 0.2
--.ARV.Z. 1990-07-25T11:22:37.58 10.0 undecidable manual SG 355 0.4773 0.11 0.7
--.ALP.Z. 1990-07-25T11:22:37.50 10.0 undecidable manual SG 120 0.4773 -0.12 1
--.AOI.Z. 1990-07-25T11:22:33.30 10.0 undecidable manual PG 39 0.6882 -0.72 0.4
--.MNS.Z. 1990-07-25T11:22:33.99 10.0 undecidable manual PG 200 0.6771 0.05 1.4
--.ALP.Z. 1990-07-25T11:22:29.50 10.0 undecidable manual PG 120 0.4773 -0.78 0.4
--.ARV.Z. 1990-07-25T11:22:29.83 10.0 undecidable manual PG 355 0.4773 -0.36 1.3
--.ASS.Z. 1990-07-25T11:22:29.83 10.0 undecidable manual SG 279 0.2553 -0.54 0.4
--.CIO.Z. 1990-07-25T11:22:28.70 10.0 undecidable manual SG 31 0.1998 0.08 1.1
--.RMF.Z. 1990-07-25T11:22:27.62 10.0 undecidable manual SG 114 0.1665 0.05 0.7
--.ASS.Z. 1990-07-25T11:22:26.35 10.0 undecidable manual PG 279 0.2553 0.27 1.5
--.CIO.Z. 1990-07-25T11:22:25.20 10.0 undecidable manual PG 31 0.1998 0.12 3.5
--.RMF.Z. 1990-07-25T11:22:24.85 10.0 undecidable manual PG 114 0.1665 0.38 1.2
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