INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.8 on date 21-09-2018 and time 05:45:46 (Italy) in region 6 km SW Borgo Pace (PU)

A magnitude ML 0.8 earthquake occured in region: 6 km SW Borgo Pace (PU), on

  • 21-09-2018 03:45:46 (UTC)
  • 21-09-2018 05:45:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.63, 12.24 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
Borgo Pace PU 6 606 606
Mercatello sul Metauro PU 8 1378 1984
Badia Tedalda AR 9 1087 3071
Sestino AR 10 1355 4426
Sansepolcro AR 10 15884 20310
San Giustino PG 10 11297 31607
Sant'Angelo in Vado PU 15 4133 35740
Belforte all'Isauro PU 15 769 36509
Pieve Santo Stefano AR 16 3183 39692
Apecchio PU 17 1882 41574
Citerna PG 18 3531 45105
Anghiari AR 18 5638 50743
Piandimeleto PU 18 2167 52910
Carpegna PU 19 1674 54584
Frontino PU 19 293 54877
Monterchi AR 19 1757 56634
Casteldelci RN 19 407 57041
Città di Castello PG 19 39913 96954
Lunano PU 20 1527 98481

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Arezzo (99543 inhabitants)
55 Km SW of Rimini (147750 inhabitants)
56 Km S of Cesena (96758 inhabitants)
60 Km N of Perugia (166134 inhabitants)
63 Km W of Pesaro (94582 inhabitants)
67 Km W of Fano (60888 inhabitants)
68 Km S of Forlì (117913 inhabitants)
78 Km SE of Faenza (58541 inhabitants)
80 Km E of Firenze (382808 inhabitants)
81 Km E of Siena (53903 inhabitants)
84 Km NW of Foligno (57155 inhabitants)
86 Km E of Scandicci (50609 inhabitants)
88 Km S of Ravenna (159116 inhabitants)
91 Km SE of Imola (69797 inhabitants)
96 Km E of Prato (191150 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 0.8 2018-09-21
03:45:46
43.63 12.24 9 2018-09-21
03:51:45
Sala Sismica INGV-Roma 61166981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-21 03:45:46 ± 0.1
Latitude 43.63 ± 0.01
Longitude 12.24 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61166981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 509
Semi-minor axis of confidence ellipse (meter) 321
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 351
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) 96
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.37142
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 61166981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-21 03:51:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2018-09-21T03:46:01.78 3.0 negative manual P -2.76 0
IV.CRE.HHZ. 2018-09-21T03:45:55.52 0.1 undecidable manual S 267 0.2068 110 0.01 98
IV.FRON.EHZ. 2018-09-21T03:45:54.86 0.6 negative manual P 108 0.3714 50 -0.23 46
IV.CAFI.HHZ. 2018-09-21T03:45:54.75 0.1 positive manual P 213 0.3597 50 -0.15 93
IV.ATVO.HHZ. 2018-09-21T03:45:53.44 1.0 undecidable manual P 154 0.277 106 0.04 24
IV.PE3.EHZ. 2018-09-21T03:45:52.18 0.6 negative manual P 71 0.1979 111 0.45 45
IV.CRE.HHZ. 2018-09-21T03:45:52.03 1.0 positive manual P 267 0.2068 110 0.12 24
IV.ATPI.EHZ. 2018-09-21T03:45:52.03 0.1 undecidable manual P 146 0.2158 110 -0.07 97
IV.BADI.EHZ. 2018-09-21T03:45:52.53 0.1 undecidable manual S 178 0.1214 122 -0.01 100
IV.PIEI.HHZ. 2018-09-21T03:45:52.33 0.3 negative manual P 114 0.2356 108 -0.18 71
IV.SSP9.EHZ. 2018-09-21T03:45:51.63 0.1 undecidable manual S 233 0.0953 129 -0.11 99
IV.BADI.EHZ. 2018-09-21T03:45:50.48 0.1 undecidable manual P 178 0.1214 122 0.28 95
IV.PARC.HHZ. 2018-09-21T03:45:49.79 0.1 undecidable manual S 3 0.018 167 -0.26 97
IV.SSP9.EHZ. 2018-09-21T03:45:49.90 0.1 undecidable manual P 233 0.0953 129 0.17 97
IV.PARC.HHZ. 2018-09-21T03:45:48.89 0.1 undecidable manual P 3 0.018 167 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:0 0.0007635 1.9 AML other m 2018-09-21T03:45:49.00
IV.PARC.HHE. ML:0 0.000592 0.18 AML other m 2018-09-21T03:45:50.07
IV.BADI.EHN. ML:1 0.0001105 0.92 AML other m 2018-09-21T03:45:53.40
IV.BADI.EHE. ML:0.9 8.145E-5 0.52 AML other m 2018-09-21T03:45:53.69
IV.CRE.HHN. ML:0.7 3.015E-5 0.64 AML other m 2018-09-21T03:45:55.67
IV.CRE.HHE. ML:0.7 2.845E-5 1.32 AML other m 2018-09-21T03:45:56.82
IV.ATPI.EHN. ML:0.8 3.615E-5 0.74 AML other m 2018-09-21T03:45:57.58
IV.PIEI.HHE. ML:0.8 3.415E-5 1.34 AML other m 2018-09-21T03:45:57.87
IV.PIEI.HHN. ML:0.7 2.79E-5 0.26 AML other m 2018-09-21T03:45:57.91
IV.ATVO.HHN. ML:0.8 2.78E-5 0.4 AML other m 2018-09-21T03:45:58.63
IV.ATVO.HHE. ML:1.1 5.525E-5 0.64 AML other m 2018-09-21T03:45:58.71
IV.ATPI.EHE. ML:0.6 2.675E-5 0.52 AML other m 2018-09-21T03:45:58.82
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