Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 09-05-1990 and time 00:10:34 (UTC) in region 7 km E Pieve Santo Stefano (AR)

A magnitude Md 2.2 earthquake occured in region: 7 km E Pieve Santo Stefano (AR), on

  • 09-05-1990 00:10:34 (UTC)
  • 09-05-1990 02:10:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6580, 12.1250 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.

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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
Pieve Santo Stefano AR 7 3183 3183
Badia Tedalda AR 7 1087 4270
Sansepolcro AR 10 15884 20154
Caprese Michelangelo AR 11 1426 21580
San Giustino PG 13 11297 32877
Borgo Pace PU 14 606 33483
Anghiari AR 14 5638 39121
Sestino AR 15 1355 40476
Casteldelci RN 15 407 40883
Chiusi della Verna AR 16 2023 42906
Mercatello sul Metauro PU 17 1378 44284
Citerna PG 18 3531 47815
Verghereto FC 18 1907 49722
Monterchi AR 19 1757 51479
Chitignano AR 20 899 52378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Arezzo (99543 inhabitants)
54 Km S of Cesena (96758 inhabitants)
57 Km SW of Rimini (147750 inhabitants)
63 Km S of Forlì (117913 inhabitants)
65 Km NW of Perugia (166134 inhabitants)
69 Km W of Pesaro (94582 inhabitants)
71 Km E of Firenze (382808 inhabitants)
73 Km S of Faenza (58541 inhabitants)
74 Km NE of Siena (53903 inhabitants)
75 Km W of Fano (60888 inhabitants)
77 Km E of Scandicci (50609 inhabitants)
84 Km SE of Imola (69797 inhabitants)
85 Km S of Ravenna (159116 inhabitants)
86 Km E of Prato (191150 inhabitants)
91 Km NW of Foligno (57155 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 2.2
ML-VAX 1.7 		1990-05-09
00:10:34		 43.658 12.125 6 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 117839
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-05-09 00:10:34 ± 0.221
Latitude 43.6580 ± 0.0147
Longitude 12.1250 ± 0.0155
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 117839

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) 2054.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.01198
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 117839
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:49:26

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 117839
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
--.MNS.Z. 1990-05-09T00:11:19.00 10.0 undecidable manual SN 161 1.332 1.42 0.1
--.BDI.Z. 1990-05-09T00:11:13.00 10.0 undecidable manual SN 290 1.1655 -0.7 0.3
--.CIO.Z. 1990-05-09T00:11:03.61 10.0 undecidable manual SG 121 0.8769 -1.29 0.2
--.MNS.Z. 1990-05-09T00:10:58.50 10.0 undecidable manual PN 161 1.332 -0.71 0.7
--.BDI.Z. 1990-05-09T00:10:57.50 10.0 undecidable manual PN 290 1.1655 0.52 1
--.ARV.Z. 1990-05-09T00:10:56.91 10.0 undecidable manual SG 104 0.6105 0.3 0.7
--.CIO.Z. 1990-05-09T00:10:50.48 10.0 undecidable manual PG 121 0.8769 -1.42 0.2
--.ASS.Z. 1990-05-09T00:10:50.00 10.0 undecidable manual PG 146 0.6993 1.16 0.5
--.ARV.Z. 1990-05-09T00:10:48.00 10.0 undecidable manual PG 104 0.6105 0.89 0.8
--.PGD.Z. 1990-05-09T00:10:48.43 10.0 undecidable manual SG 306 0.3552 0.18 0.7
--.RSM.Z. 1990-05-09T00:10:47.54 10.0 undecidable manual SG 40 0.3552 -0.56 0.5
--.SFI.Z. 1990-05-09T00:10:46.70 10.0 undecidable manual SG 320 0.3108 0.21 0.7
--.RSM.Z. 1990-05-09T00:10:42.54 10.0 positive manual PG 40 0.3552 0.35 3.2
--.PGD.Z. 1990-05-09T00:10:41.97 10.0 undecidable manual PG 306 0.3552 -0.31 1.6
--.SFI.Z. 1990-05-09T00:10:40.94 10.0 undecidable manual PG 320 0.3108 -0.33 1.6
--.CRE.Z. 1990-05-09T00:10:39.59 10.0 undecidable manual SG 253 0.1221 0.05 0.7
--.CRE.Z. 1990-05-09T00:10:37.21 10.0 positive manual PG 253 0.1221 -0.04 3.5
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