Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 04-03-2021 and time 09:17:26 (Italy) in region 7 km NE Città di Castello (PG)

A magnitude ML 0.7 earthquake occured in region: 7 km NE Città di Castello (PG), on

  • 04-03-2021 08:17:26 (UTC)
  • 04-03-2021 09:17:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.51, 12.29 at 7 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Città di Castello PG 7 39913 39913
San Giustino PG 10 11297 51210
Apecchio PU 12 1882 53092
Monte Santa Maria Tiberina PG 13 1183 54275
Citerna PG 14 3531 57806
Sansepolcro AR 14 15884 73690
Pietralunga PG 14 2111 75801
Monterchi AR 14 1757 77558
Montone PG 16 1680 79238
Mercatello sul Metauro PU 16 1378 80616
Borgo Pace PU 17 606 81222
Anghiari AR 19 5638 86860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Arezzo (99543 inhabitants)
45 Km N of Perugia (166134 inhabitants)
66 Km SW of Rimini (147750 inhabitants)
68 Km SW of Pesaro (94582 inhabitants)
70 Km NW of Foligno (57155 inhabitants)
70 Km SW of Fano (60888 inhabitants)
70 Km S of Cesena (96758 inhabitants)
80 Km E of Siena (53903 inhabitants)
82 Km S of Forlì (117913 inhabitants)
88 Km E of Firenze (382808 inhabitants)
93 Km SE of Faenza (58541 inhabitants)
93 Km E of Scandicci (50609 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.7 2021-03-04
08:17:26		 43.51 12.29 7 2021-03-04
08:54:12		 Sala Sismica INGV-Roma 87703691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-04 08:17:26 ± 0.19
Latitude 43.51 ± 0.00
Longitude 12.29 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87703691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 509
Semi-minor axis of confidence ellipse (meter) 242
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 4
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.23742
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 87703691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-04 08:54:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CMDO.HHZ. 2021-03-04T08:19:10.34 3.0 undecidable manual Pg 26.6 0
CR.STON.BHZ. 2021-03-04T08:18:42.86 3.0 undecidable manual Pg 18.35 0
IV.USI.HHZ. 2021-03-04T08:18:40.80 3.0 undecidable manual Pg 15.42 0
IV.RNI2.HHZ. 2021-03-04T08:18:39.35 3.0 undecidable manual Sg 10.55 0
IV.CORL.HHZ. 2021-03-04T08:18:38.64 3.0 positive manual Pn 2.18 0
IV.SCHR.EHZ. 2021-03-04T08:18:38.36 3.0 undecidable manual Pg 13.76 0
IV.QLNO.HHZ. 2021-03-04T08:18:32.56 3.0 undecidable manual Sg 11.13 0
IV.CADC.EHZ. 2021-03-04T08:18:20.88 3.0 undecidable manual Sg 0.41 0
IV.ZEN8.EHZ. 2021-03-04T08:18:15.83 3.0 undecidable manual Sn -6.22 0
IV.ARRO.EHZ. 2021-03-04T08:17:56.38 3.0 undecidable manual Sn 0.53 0
IV.PCN.EHZ. 2021-03-04T08:17:54.26 3.0 negative manual Pg 6.33 0
GU.CANO.HHZ. 2021-03-04T08:17:54.93 3.0 negative manual Pn 2.74 0
IV.SARZ.HHZ. 2021-03-04T08:17:50.56 3.0 negative manual Pn -0.77 0
GU.GRAM.HHZ. 2021-03-04T08:17:39.18 3.0 undecidable manual Pn -0.71 0
IV.NARO.HHZ. 2021-03-04T08:17:36.08 0.6 undecidable manual S 64 0.2374 106 -0.26 47
IV.ATBU.EHN. 2021-03-04T08:17:34.27 0.3 undecidable manual S 99 0.1925 109 -0.43 69
IV.PIEI.HHZ. 2021-03-04T08:17:34.69 0.6 undecidable manual S 81 0.1826 110 0.35 47
IV.PARC.HHZ. 2021-03-04T08:17:33.23 0.6 undecidable manual S 346 0.1457 114 0.19 49
IV.CAFI.HHZ. 2021-03-04T08:17:33.23 3.0 undecidable manual S 0.38 0
IV.ATVO.HHZ. 2021-03-04T08:17:33.64 0.6 undecidable manual S 145 0.152 114 0.4 47
IV.TB03.DHZ.01 2021-03-04T08:17:33.09 0.6 undecidable manual S 139 0.1385 116 0.32 48
IV.ATPC.HNN. 2021-03-04T08:17:32.24 0.6 undecidable manual S 102 0.1259 118 -0.12 50
IV.NARO.HHZ. 2021-03-04T08:17:32.34 0.6 undecidable manual P 64 0.2374 106 0 50
IV.ATPI.EHZ. 2021-03-04T08:17:31.43 0.6 undecidable manual S 124 0.1007 123 -0.08 50
IV.PIEI.HHZ. 2021-03-04T08:17:31.43 1.0 positive manual P 81 0.1826 110 0.25 24
IV.ATVO.HHZ. 2021-03-04T08:17:30.66 0.3 positive manual P 145 0.152 114 0.11 74
IV.TB03.DHZ.01 2021-03-04T08:17:30.37 0.1 undecidable manual P 139 0.1385 116 0.1 100
IV.PARC.HHZ. 2021-03-04T08:17:30.75 1.0 undecidable manual P 346 0.1457 114 0.32 24
IV.ATBU.EHN. 2021-03-04T08:17:30.95 0.1 undecidable manual P 99 0.1925 109 -0.43 92
IV.ATMC.EHN. 2021-03-04T08:17:30.77 0.6 undecidable manual S 229 0.0908 126 -0.41 47
IV.ATPC.HNN. 2021-03-04T08:17:30.24 0.1 undecidable manual P 102 0.1259 118 0.21 98
IV.ATMC.EHN. 2021-03-04T08:17:29.22 0.1 undecidable manual P 229 0.0908 126 -0.13 100
IV.BADI.EHZ. 2021-03-04T08:17:29.66 0.6 undecidable manual S 276 0.0306 155 -0.02 52
IV.ATPI.EHZ. 2021-03-04T08:17:29.78 1.0 undecidable manual P 124 0.1007 123 0.23 24
IV.BADI.EHZ. 2021-03-04T08:17:28.64 0.6 negative manual P 276 0.0306 155 0.16 50
IV.FIR.HHZ. 2021-03-04T08:17:24.90 3.0 undecidable manual P 0.81 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BADI.EHN. ML:0 0.0004245 0.36 AML other m 2021-03-04T08:17:29.85
IV.BADI.EHE. ML:0 0.0003565 0.1 AML other m 2021-03-04T08:17:29.90
IV.ATPI.EHE. ML:0.6 5.215E-5 0.08 AML other m 2021-03-04T08:17:31.88
IV.ATPI.EHN. ML:0.7 6.35E-5 1.92 AML other m 2021-03-04T08:17:32.96
IV.ATVO.HHE. ML:0.8 6.655E-5 0.4 AML other m 2021-03-04T08:17:33.77
IV.PARC.HHE. ML:1 9.65E-5 1.86 AML other m 2021-03-04T08:17:34.01
IV.ATVO.HHN. ML:0.9 7.245E-5 0.22 AML other m 2021-03-04T08:17:34.02
IV.PARC.HHN. ML:0.7 4.885E-5 1.84 AML other m 2021-03-04T08:17:34.06
IV.PIEI.HHN. ML:0.3 1.2605E-5 0.22 AML other m 2021-03-04T08:17:35.24
IV.PIEI.HHE. ML:0.4 2.09E-5 1.1 AML other m 2021-03-04T08:17:35.62
IV.NARO.HHN. ML:0.4 1.287E-5 0.54 AML other m 2021-03-04T08:17:36.71
IV.NARO.HHE. ML:0.2 9.595E-6 0.64 AML other m 2021-03-04T08:17:36.43
IV.ATPI.HNE. ML:0.7 7.328229E-5 1.0048 AML other m 2021-03-04T08:17:31.74
IV.ATPI.HNN. ML:1 0.000146072311 2.1632 AML other m 2021-03-04T08:17:32.35
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