INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.4 on date 13-08-2018 and time 01:13:41 (Italy) in region 4 km W Sansepolcro (AR)

A magnitude ML 1.4 earthquake occured in region: 4 km W Sansepolcro (AR), on

  • 12-08-2018 23:13:41 (UTC)
  • 13-08-2018 01:13:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.57, 12.09 at 9 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sansepolcro AR 4 15884 15884
Anghiari AR 4 5638 21522
San Giustino PG 7 11297 32819
Citerna PG 8 3531 36350
Monterchi AR 9 1757 38107
Pieve Santo Stefano AR 12 3183 41290
Caprese Michelangelo AR 12 1426 42716
Monte Santa Maria Tiberina PG 16 1183 43899
Città di Castello PG 17 39913 83812
Badia Tedalda AR 17 1087 84899
Subbiano AR 18 6331 91230
Capolona AR 19 5438 96668
Borgo Pace PU 19 606 97274
Chiusi della Verna AR 19 2023 99297

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Arezzo (99543 inhabitants)
57 Km NW of Perugia (166134 inhabitants)
64 Km S of Cesena (96758 inhabitants)
67 Km SW of Rimini (147750 inhabitants)
67 Km E of Siena (53903 inhabitants)
71 Km E of Firenze (382808 inhabitants)
73 Km S of Forlì (117913 inhabitants)
76 Km SW of Pesaro (94582 inhabitants)
76 Km E of Scandicci (50609 inhabitants)
81 Km W of Fano (60888 inhabitants)
82 Km S of Faenza (58541 inhabitants)
84 Km NW of Foligno (57155 inhabitants)
87 Km E of Prato (191150 inhabitants)
93 Km SE of Imola (69797 inhabitants)
95 Km S of Ravenna (159116 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
Rev 100 ML 1.4 2018-08-12
23:13:41
43.57 12.09 9 2018-08-12
23:25:19
Sala Sismica INGV-Roma 59696441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-12 23:13:41 ± 0.06
Latitude 43.57 ± 0.00
Longitude 12.09 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59696441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 280
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 215
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61873
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 23
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 59696441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-12 23:25:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SGG.HHZ. 2018-08-12T23:14:31.19 3.0 undecidable manual Pg 9.15 0
IV.MBAL.EHZ. 2018-08-12T23:14:18.93 3.0 undecidable manual Sg 1.18 0
IV.ARVD.HHZ. 2018-08-12T23:14:03.02 0.1 undecidable manual S 96 0.6187 50 0.73 74
IV.CSNT.HHN. 2018-08-12T23:14:01.83 0.3 undecidable manual S 261 0.5891 50 0.41 62
IV.ATCC.EHZ. 2018-08-12T23:14:00.83 0.1 undecidable manual S 134 0.5522 50 0.52 82
IV.SSFR.HHZ. 2018-08-12T23:13:59.91 0.1 undecidable manual S 105 0.5171 50 0.63 79
IV.MURB.HHZ. 2018-08-12T23:13:57.08 0.1 undecidable manual S 134 0.4371 50 0.16 90
IV.ATFO.HHZ. 2018-08-12T23:13:55.57 0.1 undecidable manual S 120 0.4011 50 -0.28 89
IV.MBAL.EHZ. 2018-08-12T23:13:55.78 3.0 undecidable manual Pn -0.75 0
IV.SFI.EHE. 2018-08-12T23:13:55.20 0.1 undecidable manual S 332 0.3804 50 -0.03 94
IV.ATTE.HHZ. 2018-08-12T23:13:55.71 0.1 undecidable manual S 153 0.4155 50 -0.56 83
IV.NARO.HHZ. 2018-08-12T23:13:54.21 0.1 undecidable manual S 83 0.3561 50 -0.29 90
IV.PIEI.HHZ. 2018-08-12T23:13:53.47 0.1 undecidable manual S 96 0.322 50 -0.03 95
IV.PE3.EHZ. 2018-08-12T23:13:53.63 0.1 undecidable manual S 66 0.3184 50 0.23 91
IV.CSNT.HHN. 2018-08-12T23:13:53.29 0.3 undecidable manual P 261 0.5891 50 0.5 61
IV.ARVD.HHZ. 2018-08-12T23:13:53.51 0.1 undecidable manual P 96 0.6187 50 0.21 86
IV.ATVO.HHZ. 2018-08-12T23:13:52.14 0.1 undecidable manual S 129 0.2941 50 -0.53 86
IV.FOSV.EHZ. 2018-08-12T23:13:52.30 0.3 undecidable manual P 119 0.5567 50 0.06 68
IV.ATCC.EHZ. 2018-08-12T23:13:52.23 0.1 undecidable manual P 134 0.5522 50 0.08 90
IV.ASQU.HHZ. 2018-08-12T23:13:52.86 0.1 undecidable manual S 316 0.3166 50 -0.48 87
IV.ATPI.EHZ. 2018-08-12T23:13:51.12 0.1 undecidable manual S 117 0.2536 107 -0.12 95
IV.CAFI.HHZ. 2018-08-12T23:13:51.26 0.1 undecidable manual S 201 0.2554 107 -0.07 96
IV.ATMI.HHZ. 2018-08-12T23:13:51.36 0.1 undecidable manual S 151 0.2662 107 -0.35 90
IV.SSFR.HHZ. 2018-08-12T23:13:51.43 0.1 undecidable manual P 105 0.5171 50 -0.12 90
IV.APEC.HHZ. 2018-08-12T23:13:50.55 0.1 undecidable manual S 92 0.2374 109 -0.1 95
IV.MURB.HHZ. 2018-08-12T23:13:50.16 0.1 undecidable manual P 134 0.4371 50 -0.04 93
IV.FRON.EHZ. 2018-08-12T23:13:50.34 0.1 undecidable manual P 96 0.4614 50 -0.26 88
IV.ATTE.HHZ. 2018-08-12T23:13:49.89 0.1 undecidable manual P 153 0.4155 50 0.07 93
IV.ATFO.HHZ. 2018-08-12T23:13:49.47 0.1 undecidable manual P 120 0.4011 50 -0.11 92
IV.SFI.EHE. 2018-08-12T23:13:49.23 0.1 undecidable manual P 332 0.3804 50 0.01 94
IV.NARO.HHZ. 2018-08-12T23:13:48.53 0.1 undecidable manual P 83 0.3561 50 -0.27 90
IV.ASQU.HHZ. 2018-08-12T23:13:48.20 0.1 undecidable manual P 316 0.3166 50 0.08 94
IV.PIEI.HHZ. 2018-08-12T23:13:48.05 0.1 undecidable manual P 96 0.322 50 -0.17 92
IV.PE3.EHZ. 2018-08-12T23:13:48.16 0.1 undecidable manual P 66 0.3184 50 -0.01 96
IV.ATMI.HHZ. 2018-08-12T23:13:47.09 0.1 undecidable manual P 151 0.2662 107 -0.09 95
IV.ATVO.HHZ. 2018-08-12T23:13:47.66 0.1 undecidable manual P 129 0.2941 50 -0.08 95
IV.CDCA.HNN. 2018-08-12T23:13:47.82 0.1 undecidable manual S 137 0.1502 118 0.28 93
IV.CAFI.HHZ. 2018-08-12T23:13:47.10 0.1 positive manual P 201 0.2554 107 0.14 94
IV.APEC.HHZ. 2018-08-12T23:13:46.59 0.1 undecidable manual P 92 0.2374 109 0.02 97
IV.BADI.EHZ. 2018-08-12T23:13:46.88 0.1 undecidable manual S 118 0.1241 123 0.18 96
IV.ATPI.EHZ. 2018-08-12T23:13:46.77 0.1 undecidable manual P 117 0.2536 107 -0.14 94
IV.PARC.HHZ. 2018-08-12T23:13:46.89 0.1 undecidable manual S 53 0.1331 121 -0.08 98
IV.CDCA.HNN. 2018-08-12T23:13:44.92 0.1 undecidable manual P 137 0.1502 118 0.14 96
IV.SSP9.EHZ. 2018-08-12T23:13:44.08 0.1 undecidable manual S 78 0.0288 160 -0.19 97
IV.PARC.HHZ. 2018-08-12T23:13:44.61 0.1 undecidable manual P 53 0.1331 121 0.16 96
IV.BADI.EHZ. 2018-08-12T23:13:44.61 0.1 positive manual P 118 0.1241 123 0.31 93
IV.SSP9.EHZ. 2018-08-12T23:13:42.95 0.1 undecidable manual P 78 0.0288 160 0.06 100
GU.GSCL.HHZ. 2018-08-12T23:13:41.96 3.0 undecidable manual P 0.43 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHE. ML:0 0.00124605465 0.2048 AML other m 2018-08-12T23:13:44.56
IV.SSP9.EHN. ML:0 0.0016489095 0.2816 AML other m 2018-08-12T23:13:44.22
IV.BADI.EHN. ML:1.1 0.000130966295 0.1408 AML other m 2018-08-12T23:13:47.55
IV.APEC.HHE. ML:1.4 0.00015871855 0.1408 AML other m 2018-08-12T23:13:52.47
IV.APEC.HHN. ML:1.4 0.0001467706 0.2816 AML other m 2018-08-12T23:13:51.05
IV.ATPI.EHN. ML:0.9 4.6975885E-5 0.0512 AML other m 2018-08-12T23:13:51.44
IV.ATPI.EHE. ML:1 5.039756E-5 0.1024 AML other m 2018-08-12T23:13:51.75
IV.ATMI.HHN. ML:1.5 0.0001428495 0.1152 AML other m 2018-08-12T23:13:51.78
IV.ATMI.HHE. ML:1.5 0.0001585501 0.1792 AML other m 2018-08-12T23:13:51.72
IV.CAFI.HHN. ML:0.9 4.658304E-5 0.1152 AML other m 2018-08-12T23:13:51.87
IV.CAFI.HNN. ML:0.9 4.2112805E-5 0.1152 AML other m 2018-08-12T23:13:52.03
IV.CAFI.HNE. ML:1.1 6.1081135E-5 0.2432 AML other m 2018-08-12T23:13:51.96
IV.CAFI.HHE. ML:1.1 5.7655505E-5 0.2304 AML other m 2018-08-12T23:13:51.95
IV.ATVO.HHN. ML:1.1 5.83234E-5 0.2688 AML other m 2018-08-12T23:13:53.86
IV.ATVO.HHE. ML:1.1 5.78382E-5 0.1792 AML other m 2018-08-12T23:13:52.80
IV.PIEI.HHN. ML:1.4 9.1210935E-5 0.0896 AML other m 2018-08-12T23:13:53.80
IV.PIEI.HHE. ML:1.6 0.0001639704 0.0896 AML other m 2018-08-12T23:13:53.80
IV.PE3.EHE. ML:2 0.00043191765 0.2816 AML other m 2018-08-12T23:13:54.46
IV.PE3.EHN. ML:1.9 0.00034020895 0.1152 AML other m 2018-08-12T23:13:54.55
IV.ASQU.HHN. ML:0.8 2.7411855E-5 0.3584 AML other m 2018-08-12T23:13:55.07
IV.ASQU.HHE. ML:0.7 2.213381E-5 0.256 AML other m 2018-08-12T23:13:53.00
IV.NARO.HHE. ML:1.5 0.00010415795 0.0768 AML other m 2018-08-12T23:13:54.94
IV.NARO.HHN. ML:1.4 9.3106455E-5 0.064 AML other m 2018-08-12T23:13:55.42
IV.ATFO.HHE. ML:1 3.23474E-5 0.448 AML other m 2018-08-12T23:13:57.79
IV.ATFO.HHN. ML:1.2 4.831276E-5 0.3072 AML other m 2018-08-12T23:13:57.75
IV.ATTE.HHN. ML:1.3 5.2862065E-5 0.1792 AML other m 2018-08-12T23:13:56.57
IV.MURB.HHN. ML:1.5 9.3060645E-5 0.2432 AML other m 2018-08-12T23:13:59.23
IV.MURB.HHE. ML:1.5 9.4749425E-5 0.2176 AML other m 2018-08-12T23:13:58.41
IV.SSFR.HHE. ML:1.4 5.8227965E-5 0.2176 AML other m 2018-08-12T23:14:03.35
IV.SSFR.HHN. ML:1.4 5.8799855E-5 0.1536 AML other m 2018-08-12T23:14:03.77
IV.ATCC.EHE. ML:1.2 3.496938E-5 0.4096 AML other m 2018-08-12T23:14:02.55
IV.ATCC.EHN. ML:1.2 2.755313E-5 0.2176 AML other m 2018-08-12T23:14:05.01
IV.ARVD.HHN. ML:0.8 8.087132E-6 0.1408 AML other m 2018-08-12T23:14:04.01
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