Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 19-08-2023 and time 19:31:11 (Italy) in region 10 km SW Serravalle di Chienti (MC)

A magnitude ML 0.9 earthquake occured in region: 10 km SW Serravalle di Chienti (MC), on

  • 19-08-2023 17:31:11 (UTC)
  • 19-08-2023 19:31:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0120, 12.8680 at 10 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
Serravalle di Chienti MC 10 1070 1070
Valtopina PG 11 1398 2468
Monte Cavallo MC 11 145 2613
Nocera Umbra PG 13 5839 8452
Sellano PG 15 1079 9531
Foligno PG 15 57155 66686
Pieve Torina MC 15 1458 68144
Spello PG 16 8645 76789
Muccia MC 16 915 77704
Sefro MC 16 422 78126
Trevi PG 18 8469 86595
Fiordimonte MC 18 202 86797
Pievebovigliana MC 19 866 87663

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
53 Km NE of Terni (111501 inhabitants)
79 Km NW of Teramo (54892 inhabitants)
85 Km NW of L'Aquila (69753 inhabitants)
86 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
93 Km S of Fano (60888 inhabitants)
95 Km SE of Arezzo (99543 inhabitants)
100 Km S of Pesaro (94582 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
Reviewed
Rev100 		ML 0.9 2023-08-19
17:31:11		 43.0123 12.8683 10 2023-08-19
17:40:46		 Sala Sismica INGV-Roma 120298131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-19 17:31:11 ± 0.17
Latitude 43.0123 ± 0.0072
Longitude 12.8683 ± 0.0098
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120298131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 851
Semi-minor axis of confidence ellipse (meter) 645
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 49
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25811
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 120298131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-08-19 17:40:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2023-08-19T17:31:21.58 0.3 undecidable manual S 72 28.6491 50 -0.13 97
IV.NRCA.HHZ. 2023-08-19T17:31:21.52 0.6 undecidable manual S 135 28.1496 50 -0.05 66
IV.SNTG.HHZ. 2023-08-19T17:31:21.41 0.3 undecidable manual S 12 27.5502 50 0 100
IV.ARVD.HHZ. 2023-08-19T17:31:20.30 1.0 negative manual P -1.47 0
IV.FDMO.HHZ. 2023-08-19T17:31:18.37 0.3 undecidable manual S 81 17.9709 119 -0.09 100
IV.NRCA.HHZ. 2023-08-19T17:31:17.51 0.6 undecidable manual P 135 28.1496 50 0.26 63
IV.SNTG.HHZ. 2023-08-19T17:31:17.18 1.0 undecidable manual P 12 27.5502 50 0.02 33
IV.MML1.EHZ. 2023-08-19T17:31:17.54 0.6 undecidable manual S 37 13.9749 125 0.24 65
IV.CSP1.EHZ. 2023-08-19T17:31:17.58 1.0 negative manual P 72 28.6491 50 0.25 32
IV.ATCC.EHZ. 2023-08-19T17:31:17.40 0.6 undecidable manual P 0.25 1.43
IV.FDMO.HHZ. 2023-08-19T17:31:15.52 1.0 positive manual P 81 17.9709 119 0.06 33
IV.ASSB.HHZ. 2023-08-19T17:31:14.64 1.0 undecidable manual P -0.75 0.71
IV.MML1.EHZ. 2023-08-19T17:31:14.80 1.0 negative manual P 37 13.9749 125 0.02 34
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHN. ML:1.0 0.00010655 0.1 AML other m 2023-08-19T17:31:17.70
IV.MML1.EHE. ML:1.0 0.00010314999999999999 0.26 AML other m 2023-08-19T17:31:17.70
IV.FDMO.HHN. ML:0.6 0.0000291 0.14 AML other m 2023-08-19T17:31:18.90
IV.FDMO.HHE. ML:0.6 0.000032850000000000006 0.14 AML other m 2023-08-19T17:31:19.16
IV.NRCA.HHN. ML:1.1 0.00006965 0.18 AML other m 2023-08-19T17:31:21.67
IV.NRCA.HHE. ML:0.9 0.0000435 0.14 AML other m 2023-08-19T17:31:22.59
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