Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-09-2023 and time 12:05:20 (Italy) in region 3 km SE Sarnano (MC)

A magnitude ML 1.2 earthquake occured in region: 3 km SE Sarnano (MC), on

  • 21-09-2023 10:05:20 (UTC)
  • 21-09-2023 12:05:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0080, 13.3190 at 17 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
Sarnano MC 4 3264 3264
Amandola FM 4 3629 6893
Gualdo MC 7 815 7708
Montefortino FM 7 1178 8886
Bolognola MC 8 142 9028
Comunanza AP 10 3166 12194
Penna San Giovanni MC 10 1108 13302
Monte San Martino MC 10 765 14067
Smerillo FM 10 365 14432
San Ginesio MC 11 3498 17930
Montefalcone Appennino FM 12 424 18354
Acquacanina MC 12 121 18475
Montemonaco AP 12 604 19079
Sant'Angelo in Pontano MC 12 1436 20515
Cessapalombo MC 12 512 21027
Fiastra MC 14 559 21586
Camporotondo di Fiastrone MC 15 563 22149
Santa Vittoria in Matenano FM 15 1330 23479
Force AP 15 1354 24833
Ripe San Ginesio MC 16 852 25685
Ussita MC 16 444 26129
Caldarola MC 16 1823 27952
Servigliano FM 16 2336 30288
Palmiano AP 17 196 30484
Falerone FM 17 3337 33821
Monteleone di Fermo FM 18 395 34216
Colmurano MC 18 1263 35479
Montelparo FM 18 778 36257
Castelsantangelo sul Nera MC 18 281 36538
Montegallo AP 18 523 37061
Monte Vidon Corrado FM 19 731 37792
Belforte del Chienti MC 19 1886 39678
Montappone FM 19 1682 41360
Fiordimonte MC 19 202 41562
Loro Piceno MC 19 2401 43963
Venarotta AP 20 2066 46029

Municipalities with at least 50000 inhabitants

An earthquake occurred to
50 Km NW of Teramo (54892 inhabitants)
50 Km E of Foligno (57155 inhabitants)
70 Km S of Ancona (100861 inhabitants)
73 Km N of L'Aquila (69753 inhabitants)
74 Km NE of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
87 Km NW of Montesilvano (53738 inhabitants)
95 Km NW of Pescara (121014 inhabitants)
96 Km S of Fano (60888 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 1.2 2023-09-21
10:05:20		 43.0078 13.3188 17 2023-09-21
10:21:07		 Sala Sismica INGV-Roma 121308631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-21 10:05:20 ± 0.17
Latitude 43.0078 ± 0.0045
Longitude 13.3188 ± 0.0098
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121308631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 621
Semi-minor axis of confidence ellipse (meter) 570
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.27429
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 121308631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-21 10:21:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MML1.EHZ. 2023-09-21T10:05:31.93 0.6 undecidable manual S 293 30.4473 109 0.33 46
IV.MC2.EHZ. 2023-09-21T10:05:28.20 0.6 undecidable manual S 225 14.9739 131 0.22 48
IV.PF6.EHZ. 2023-09-21T10:05:28.32 0.6 undecidable manual S 325 17.5713 126 -0.2 47
IV.FDMO.HHZ. 2023-09-21T10:05:28.69 0.6 undecidable manual S 280 19.0698 123 -0.14 48
7F.SIB3.EHZ. 2023-09-21T10:05:27.88 0.6 undecidable manual S 195 15.2736 131 -0.14 49
IV.MMO1.HNZ. 2023-09-21T10:05:27.33 0.6 undecidable manual S 177 12.0768 139 -0.09 49
IV.MML1.EHZ. 2023-09-21T10:05:27.13 0.3 positive manual P 293 30.4473 109 0.13 71
7F.SIB2.EHZ. 2023-09-21T10:05:27.34 0.6 undecidable manual S 185 12.9759 136 -0.25 48
IV.CSP1.EHZ. 2023-09-21T10:05:27.51 0.6 undecidable manual S 315 13.0758 136 -0.1 49
IV.SAP2.EHZ. 2023-09-21T10:05:27.79 0.6 undecidable manual S 33 11.7771 139 0.41 46
IV.GUMA.HHZ. 2023-09-21T10:05:26.73 0.6 undecidable manual S 12 6.1938 157 0.15 50
IV.PF6.EHZ. 2023-09-21T10:05:25.15 0.1 undecidable manual P 325 17.5713 126 -0.08 98
IV.MC2.EHZ. 2023-09-21T10:05:25.10 0.1 undecidable manual P 225 14.9739 131 0.19 96
7F.SIB2.EHZ. 2023-09-21T10:05:24.65 0.1 undecidable manual P 185 12.9759 136 -0.04 100
IV.CSP1.EHZ. 2023-09-21T10:05:24.77 0.1 positive manual P 315 13.0758 136 0.07 99
IV.FDMO.HHZ. 2023-09-21T10:05:24.78 0.6 undecidable manual P 280 19.0698 123 -0.62 43
IV.SAP2.EHZ. 2023-09-21T10:05:24.23 0.1 undecidable manual P 33 11.7771 139 -0.33 94
7F.SIB3.EHZ. 2023-09-21T10:05:24.96 0.1 undecidable manual P 195 15.2736 131 0.02 99
IV.GUMA.HHZ. 2023-09-21T10:05:24.30 0.3 negative manual P 12 6.1938 157 0.2 73
IV.MMO1.HNZ. 2023-09-21T10:05:24.66 0.1 undecidable manual P 177 12.0768 139 0.07 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUMA.HHE. ML:1.4 0.00026000000000000003 0.34 AML other m 2023-09-21T10:05:26.98
IV.GUMA.HHN. ML:1.0 0.00010180105 0.2816 AML other m 2023-09-21T10:05:27.30
IV.FDMO.HHE. ML:1.0 0.00005545 0.18 AML other m 2023-09-21T10:05:28.85
IV.FDMO.HHN. ML:0.8 0.0000373 0.14 AML other m 2023-09-21T10:05:28.96
IV.GUMA.HNE. ML:1.3 0.0002044754 0.3392 AML other m 2023-09-21T10:05:27.15
IV.GUMA.HNN. ML:1.4 0.00022832285000000003 0.32 AML other m 2023-09-21T10:05:26.81
IV.CSP1.EHE. ML:1.2 0.0001266143 0.2752 AML other m 2023-09-21T10:05:27.78
IV.CSP1.EHN. ML:1.4 0.0001687862 0.2624 AML other m 2023-09-21T10:05:27.88
IV.MML1.EHE. ML:0.4 0.000012166335 0.1984 AML other m 2023-09-21T10:05:32.08
IV.MML1.EHN. ML:0.8 0.000027195074999999998 0.1408 AML other m 2023-09-21T10:05:31.95
IV.MML1.HNE. ML:1.3 0.00008253845999999999 0.448 AML other m 2023-09-21T10:05:31.87
IV.MML1.HNN. ML:1.3 0.000092255055 1.4912 AML other m 2023-09-21T10:05:32.46
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