INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.4 on date 09-09-2018 and time 23:20:32 (Italy) in region 4 km N Città di Castello (PG)

A magnitude ML 0.4 earthquake occured in region: 4 km N Città di Castello (PG), on

  • 09-09-2018 21:20:32 (UTC)
  • 09-09-2018 23:20:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5, 12.24 at 5 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
Città di Castello PG 5 39913 39913
San Giustino PG 7 11297 51210
Monte Santa Maria Tiberina PG 9 1183 52393
Citerna PG 10 3531 55924
Monterchi AR 10 1757 57681
Sansepolcro AR 11 15884 73565
Anghiari AR 15 5638 79203
Apecchio PU 16 1882 81085
Montone PG 17 1680 82765
Pietralunga PG 18 2111 84876
Borgo Pace PU 19 606 85482
Mercatello sul Metauro PU 19 1378 86860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Arezzo (99543 inhabitants)
45 Km N of Perugia (166134 inhabitants)
68 Km SW of Rimini (147750 inhabitants)
71 Km S of Cesena (96758 inhabitants)
71 Km NW of Foligno (57155 inhabitants)
71 Km SW of Pesaro (94582 inhabitants)
74 Km SW of Fano (60888 inhabitants)
76 Km E of Siena (53903 inhabitants)
82 Km S of Forlì (117913 inhabitants)
84 Km E of Firenze (382808 inhabitants)
90 Km E of Scandicci (50609 inhabitants)
92 Km SE of Faenza (58541 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 0.4 2018-09-09
21:20:32
43.5 12.24 5 2018-09-09
21:27:08
Sala Sismica INGV-Roma 60757201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-09 21:20:32 ± 0.1
Latitude 43.50 ± 0.00
Longitude 12.24 ± 0.00
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 60757201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 390
Semi-minor axis of confidence ellipse (meter) 20
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 46
Circular confidence region, given by single value of horizontal uncertainty (meter) 390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.01349
Epicentral distance of station farthest from the epicenter (degree) 0.27339
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 60757201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-09 21:27:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2018-09-09T21:20:40.51 0.1 undecidable manual S 80 0.2203 101 -0.18 93
IV.PARC.HHZ. 2018-09-09T21:20:38.20 0.1 undecidable manual S 1 0.1502 107 0.15 95
IV.ATVO.HHZ. 2018-09-09T21:20:38.88 0.1 undecidable manual S 133 0.17 105 0.08 96
IV.PE3.EHZ. 2018-09-09T21:20:38.73 0.6 undecidable manual P 44 0.2734 99 0.54 42
IV.CRE.HHZ. 2018-09-09T21:20:37.35 0.6 negative manual P 300 0.2383 101 -0.06 48
IV.ATPI.EHZ. 2018-09-09T21:20:37.41 0.1 undecidable manual S 111 0.1304 109 0.08 97
IV.APEC.HHZ. 2018-09-09T21:20:37.94 0.1 undecidable manual S 66 0.1466 107 0.01 98
IV.CAFI.HHZ. 2018-09-09T21:20:37.85 0.6 undecidable manual P 229 0.2581 100 0 48
IV.PIEI.HHZ. 2018-09-09T21:20:36.69 1.0 positive manual P 80 0.2203 101 -0.34 23
IV.APEC.HHZ. 2018-09-09T21:20:35.31 1.0 negative manual P 66 0.1466 107 -0.12 24
IV.PARC.HHZ. 2018-09-09T21:20:35.31 0.1 positive manual P 1 0.1502 107 -0.19 94
IV.ATVO.HHZ. 2018-09-09T21:20:35.92 1.0 undecidable manual P 133 0.17 105 -0.02 24
IV.ATPI.EHZ. 2018-09-09T21:20:35.05 1.0 positive manual P 111 0.1304 109 -0.04 24
IV.BADI.EHZ. 2018-09-09T21:20:33.79 0.1 undecidable manual S 31 0.0135 164 -0.03 100
IV.BADI.EHZ. 2018-09-09T21:20:33.07 0.6 undecidable manual P 31 0.0135 164 0.01 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.2 2.01E-5 0.3 AML other m 2018-09-09T21:20:37.79
IV.ATPI.EHN. ML:0.1 1.745E-5 0.08 AML other m 2018-09-09T21:20:37.87
IV.PARC.HHE. ML:0.6 4.025E-5 0.36 AML other m 2018-09-09T21:20:38.47
IV.PARC.HHN. ML:0.7 4.39E-5 0.32 AML other m 2018-09-09T21:20:38.29
IV.ATVO.HHN. ML:0.5 2.28E-5 1.12 AML other m 2018-09-09T21:20:39.70
IV.ATVO.HHE. ML:0.4 1.845E-5 0.4 AML other m 2018-09-09T21:20:39.94
IV.PIEI.HHE. ML:0.5 1.86E-5 1.34 AML other m 2018-09-09T21:20:41.00
IV.PIEI.HHN. ML:-0.1 6.915E-6 0.72 AML other m 2018-09-09T21:20:42.77
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