Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-09-2021 and time 13:45:11 (Italy) in region 3 km W Casteldelci (RN)

A magnitude ML 1.2 earthquake occured in region: 3 km W Casteldelci (RN), on

  • 18-09-2021 11:45:11 (UTC)
  • 18-09-2021 13:45:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.7910, 12.1240 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Casteldelci RN 3 407 407
Verghereto FC 9 1907 2314
Badia Tedalda AR 11 1087 3401
Sant'Agata Feltria RN 11 2151 5552
Pennabilli RN 12 2869 8421
Bagno di Romagna FC 14 6026 14447
Sarsina FC 14 3446 17893
Pieve Santo Stefano AR 15 3183 21076
Sestino AR 17 1355 22431
Carpegna PU 17 1674 24105
Novafeltria RN 18 7164 31269
Maiolo RN 18 848 32117
Chiusi della Verna AR 18 2023 34140
Talamello RN 18 1104 35244
Mercato Saraceno FC 19 6886 42130
Caprese Michelangelo AR 20 1426 43556
Montecopiolo PU 20 1128 44684

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km S of Cesena (96758 inhabitants)
41 Km NE of Arezzo (99543 inhabitants)
47 Km SW of Rimini (147750 inhabitants)
49 Km S of Forlì (117913 inhabitants)
58 Km SE of Faenza (58541 inhabitants)
65 Km W of Pesaro (94582 inhabitants)
70 Km E of Firenze (382808 inhabitants)
70 Km S of Ravenna (159116 inhabitants)
71 Km SE of Imola (69797 inhabitants)
72 Km W of Fano (60888 inhabitants)
76 Km E of Scandicci (50609 inhabitants)
79 Km N of Perugia (166134 inhabitants)
83 Km NE of Siena (53903 inhabitants)
83 Km E of Prato (191150 inhabitants)
98 Km E of Pistoia (90315 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
Bulletin
Rev1000 		ML 1.2 2021-09-18
11:45:11		 43.7913 12.1242 10 2022-03-30
13:04:39		 Bollettino Sismico Italiano INGV 101587591
Reviewed
Rev100 		ML 1.2 2021-09-18
11:45:11		 43.7912 12.1247 10 2021-09-18
12:11:54		 Sala Sismica INGV-Roma 95584301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 11:45:11 ± 0.08
Latitude 43.7913 ± 0.0045
Longitude 12.1242 ± 0.0050
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101587591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 548
Semi-minor axis of confidence ellipse (meter) 67
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47574
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 101587591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-01 15:57:52

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 95584301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 12:11:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CLTA.HHZ. 2021-09-18T11:47:07.30 3.0 undecidable manual Pg 12.82 0
IV.EVRN.HHZ. 2021-09-18T11:47:02.83 3.0 positive manual Pg 11.79 0
IV.SERS.HHZ. 2021-09-18T11:46:55.16 3.0 undecidable manual Pg 12.76 0
IV.PTRJ.HNZ. 2021-09-18T11:46:51.31 3.0 undecidable manual Sg 9.83 0
IV.EPOZ.HHZ. 2021-09-18T11:46:50.29 3.0 negative manual Pn -1.17 0
IV.MARS.HNZ. 2021-09-18T11:46:44.03 3.0 undecidable manual Pn -0.25 0
IV.SELL.HHZ. 2021-09-18T11:46:42.83 3.0 undecidable manual Pn 0.2 0
OT.CGL1.HHZ. 2021-09-18T11:46:40.03 3.0 undecidable manual Pg 7.95 0
IV.IST3.HHZ. 2021-09-18T11:46:37.51 3.0 negative manual Pn 0.14 0
IV.EUCT.HNZ. 2021-09-18T11:46:36.65 3.0 undecidable manual Sg 7.2 0
RF.GEPF.HHZ. 2021-09-18T11:46:34.75 3.0 undecidable manual Sg 2.77 0
IV.SGG.HHZ. 2021-09-18T11:46:34.09 3.0 undecidable manual Sn -5.31 0
IV.MRVN.HHZ. 2021-09-18T11:46:24.84 3.0 undecidable manual Pg 6.9 0
IV.MAGA.HHZ. 2021-09-18T11:46:19.35 3.0 undecidable manual Sn -3.28 0
CR.STON.BHZ. 2021-09-18T11:46:17.64 3.0 undecidable manual Pn -2.14 0
IV.VBKN.HHZ. 2021-09-18T11:46:15.41 3.0 positive manual Pg 6.67 0
IV.ZEN8.EHZ. 2021-09-18T11:46:14.57 3.0 undecidable manual Sn -4.27 0
IV.VIVA.HHZ. 2021-09-18T11:45:52.84 3.0 positive manual Pg 2.55 0
IV.CIMA.HNZ. 2021-09-18T11:45:38.98 3.0 negative manual P -0.21 0
IV.ZCCA.HNZ. 2021-09-18T11:45:31.00 3.0 undecidable manual P -3.21 0
GU.CARD.HHZ. 2021-09-18T11:45:31.17 3.0 positive manual P -6.42 0
IV.FIR.HHZ. 2021-09-18T11:45:30.96 3.0 undecidable manual S -5.57 0
IV.ATVO.HHZ. 2021-09-18T11:45:28.32 0.6 undecidable manual S 153 50.7159 50 0.49 43
IV.CAFI.HHZ. 2021-09-18T11:45:28.96 0.6 undecidable manual S 194 52.8027 50 0.58 42
IV.LMD.HHN. 2021-09-18T11:45:27.29 0.6 undecidable manual S 314 46.0206 50 0.72 40
IV.NARO.HHZ. 2021-09-18T11:45:25.16 0.6 undecidable manual S 119 41.7249 50 -0.26 46
IV.PE3.EHZ. 2021-09-18T11:45:23.08 0.6 undecidable manual S 109 31.6461 50 0.34 46
IV.APEC.HNN. 2021-09-18T11:45:23.77 0.6 undecidable manual S 137 35.0427 50 0.12 48
IV.BADI.EHZ. 2021-09-18T11:45:22.86 0.6 undecidable manual S 163 32.745 50 -0.16 48
IV.CAFI.HHZ. 2021-09-18T11:45:21.28 0.1 undecidable manual P 194 52.8027 50 0.02 96
IV.ASQU.HHZ. 2021-09-18T11:45:21.60 0.6 undecidable manual S 271 26.8509 110 0.16 49
IV.ATVO.HHZ. 2021-09-18T11:45:20.81 0.3 undecidable manual P 153 50.7159 50 -0.14 70
IV.SFI.EHZ. 2021-09-18T11:45:20.99 0.6 undecidable manual S 300 25.4523 111 -0.02 50
IV.SSP9.EHZ. 2021-09-18T11:45:20.69 0.6 undecidable manual S 179 24.1536 112 0.12 49
IV.CRE.HHZ. 2021-09-18T11:45:20.61 0.6 undecidable manual S 216 23.6541 112 0.21 48
IV.LMD.HHN. 2021-09-18T11:45:19.82 0.3 undecidable manual P 314 46.0206 50 -0.39 67
IV.CPGN.EHZ. 2021-09-18T11:45:18.57 0.6 undecidable manual S 86 15.7731 122 0.61 44
IV.APEC.HNN. 2021-09-18T11:45:18.58 0.3 undecidable manual P 137 35.0427 50 0.05 74
IV.PARC.HHZ. 2021-09-18T11:45:18.54 0.6 undecidable manual S 150 18.2706 118 -0.19 49
IV.NARO.HHZ. 2021-09-18T11:45:18.98 0.3 undecidable manual P 119 41.7249 50 -0.57 64
IV.BADI.EHZ. 2021-09-18T11:45:17.83 0.1 positive manual P 163 32.745 50 -0.34 93
IV.PE3.EHZ. 2021-09-18T11:45:17.98 0.3 undecidable manual P 109 31.6461 50 -0.02 75
IV.ASQU.HHZ. 2021-09-18T11:45:17.19 0.1 undecidable manual P 271 26.8509 110 -0.06 99
IV.SSP9.EHZ. 2021-09-18T11:45:16.64 0.3 undecidable manual P 179 24.1536 112 -0.11 74
IV.CRE.HHZ. 2021-09-18T11:45:16.71 0.1 undecidable manual P 216 23.6541 112 0.06 100
IV.SFI.EHZ. 2021-09-18T11:45:16.83 0.3 undecidable manual P 300 25.4523 111 -0.18 73
IV.CPGN.EHZ. 2021-09-18T11:45:15.42 0.1 undecidable manual P 86 15.7731 122 0.17 99
IV.PARC.HHZ. 2021-09-18T11:45:15.55 0.1 positive manual P 150 18.2706 118 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHE. ML:1.4 0.0001895 0.24 AML other m 2021-09-18T11:45:18.94
IV.PARC.HHN. ML:1.3 0.000175 1.92 AML other m 2021-09-18T11:45:19.01
IV.ASQU.HHN. ML:1.0 0.000059749999999999995 0.78 AML other m 2021-09-18T11:45:22.59
IV.ASQU.HHE. ML:1.0 0.00005375 1.48 AML other m 2021-09-18T11:45:22.99
IV.CRE.HHN. ML:0.9 0.000054 0.42 AML other m 2021-09-18T11:45:23.45
IV.BADI.EHE. ML:1.4 0.00010585 0.62 AML other m 2021-09-18T11:45:23.11
IV.BADI.EHN. ML:1.3 0.000079 0.4 AML other m 2021-09-18T11:45:24.20
IV.CRE.HHE. ML:0.8 0.00003795 1.26 AML other m 2021-09-18T11:45:25.69
IV.NARO.HHE. ML:1.0 0.0000353 1 AML other m 2021-09-18T11:45:25.30
IV.NARO.HHN. ML:1.2 0.00004885 0.08 AML other m 2021-09-18T11:45:26.00
IV.ATVO.HHE. ML:1.4 0.000059499999999999996 0.42 AML other m 2021-09-18T11:45:28.78
IV.ATVO.HHN. ML:1.1 0.00003115 0.78 AML other m 2021-09-18T11:45:29.01
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