Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 27-09-2021 and time 00:37:21 (Italy) in region 4 km SW Belforte all'Isauro (PU)

A magnitude ML 1.0 earthquake occured in region: 4 km SW Belforte all'Isauro (PU), on

  • 26-09-2021 22:37:21 (UTC)
  • 27-09-2021 00:37:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6920, 12.3430 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Belforte all'Isauro PU 4 769 769
Sestino AR 4 1355 2124
Mercatello sul Metauro PU 5 1378 3502
Borgo Pace PU 5 606 4108
Sant'Angelo in Vado PU 7 4133 8241
Piandimeleto PU 7 2167 10408
Frontino PU 9 293 10701
Lunano PU 9 1527 12228
Carpegna PU 10 1674 13902
Peglio PU 12 696 14598
Badia Tedalda AR 13 1087 15685
Pietrarubbia PU 13 660 16345
Macerata Feltria PU 15 1990 18335
Urbania PU 15 7099 25434
Pennabilli RN 15 2869 28303
Sassocorvaro PU 16 3504 31807
Apecchio PU 16 1882 33689
Montecopiolo PU 17 1128 34817
Monte Cerignone PU 18 669 35486
Piobbico PU 18 2029 37515
Casteldelci RN 19 407 37922

Municipalities with at least 50000 inhabitants

An earthquake occurred to
45 Km NE of Arezzo (99543 inhabitants)
45 Km SW of Rimini (147750 inhabitants)
50 Km S of Cesena (96758 inhabitants)
52 Km W of Pesaro (94582 inhabitants)
57 Km W of Fano (60888 inhabitants)
64 Km SE of Forlì (117913 inhabitants)
65 Km N of Perugia (166134 inhabitants)
76 Km SE of Faenza (58541 inhabitants)
82 Km S of Ravenna (159116 inhabitants)
87 Km NW of Foligno (57155 inhabitants)
88 Km E of Firenze (382808 inhabitants)
89 Km SE of Imola (69797 inhabitants)
91 Km E of Siena (53903 inhabitants)
94 Km E of Scandicci (50609 inhabitants)
95 Km W of Ancona (100861 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 1.0 2021-09-26
22:37:21		 43.6922 12.3427 9 2021-09-26
22:46:53		 Sala Sismica INGV-Roma 95921651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 22:37:21 ± 0.09
Latitude 43.6922 ± 0.0045
Longitude 12.3427 ± 0.0050
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 95921651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 514
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 12
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
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 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 0.47484
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 95921651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 22:46:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-09-26T22:37:39.48 0.3 undecidable manual S 114 52.7028 50 0.69 60
IV.FRON.EHZ. 2021-09-26T22:37:34.55 0.6 undecidable manual S 122 36.3414 50 0.13 48
IV.CRE.HHZ. 2021-09-26T22:37:33.24 0.3 undecidable manual S 256 32.4453 50 -0.12 73
IV.ATPI.EHZ. 2021-09-26T22:37:32.01 0.6 undecidable manual S 170 27.2505 109 0.13 49
IV.ATPC.HHZ. 2021-09-26T22:37:31.53 0.6 undecidable manual S 159 25.1526 110 0.32 47
IV.ARVD.HHZ. 2021-09-26T22:37:31.42 0.6 undecidable manual P 114 52.7028 50 -0.22 46
IV.SSP9.EHZ. 2021-09-26T22:37:30.55 0.6 undecidable manual S 232 21.4674 114 0.54 45
IV.FRON.EHZ. 2021-09-26T22:37:29.03 0.6 undecidable manual P 122 36.3414 50 -0.09 49
IV.NARO.HHZ. 2021-09-26T22:37:29.56 0.3 undecidable manual S 115 21.1677 114 -0.34 71
IV.CRE.HHZ. 2021-09-26T22:37:28.40 0.6 undecidable manual P 256 32.4453 50 -0.11 49
IV.APEC.HHZ. 2021-09-26T22:37:28.68 0.3 undecidable manual S 157 16.0728 120 0.33 72
IV.PE3.EHZ. 2021-09-26T22:37:27.42 0.3 undecidable manual S 88 12.3765 127 0.16 75
IV.CPGN.EHZ. 2021-09-26T22:37:27.72 0.3 undecidable manual S 352 12.1767 128 0.49 70
IV.ATPI.EHZ. 2021-09-26T22:37:27.23 0.6 undecidable manual P 170 27.2505 109 -0.43 46
IV.ATPC.HHZ. 2021-09-26T22:37:27.09 0.3 undecidable manual P 159 25.1526 110 -0.18 73
IV.PARC.HHZ. 2021-09-26T22:37:26.57 0.3 undecidable manual S 240 9.6792 134 0.02 77
IV.SSP9.EHZ. 2021-09-26T22:37:26.44 0.6 positive manual P 232 21.4674 114 -0.14 49
IV.APEC.HHZ. 2021-09-26T22:37:25.50 0.1 undecidable manual P 157 16.0728 120 -0.11 100
IV.NARO.HHZ. 2021-09-26T22:37:25.97 0.6 undecidable manual P 115 21.1677 114 -0.55 45
IV.CPGN.EHZ. 2021-09-26T22:37:24.81 0.3 undecidable manual P 352 12.1767 128 -0.16 75
IV.PARC.HHZ. 2021-09-26T22:37:24.43 0.3 undecidable manual P 240 9.6792 134 -0.15 75
IV.PE3.EHZ. 2021-09-26T22:37:24.65 0.6 negative manual P 88 12.3765 127 -0.34 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:0.7 0.0000674 0.42 AML other m 2021-09-26T22:37:26.64
IV.PARC.HHE. ML:0.5 0.0000434403 0.1408 AML other m 2021-09-26T22:37:26.94
IV.PE3.EHE. ML:0.9 0.00008955032999999999 0.1664 AML other m 2021-09-26T22:37:28.07
IV.PE3.EHN. ML:1.1 0.0001337372 0.2816 AML other m 2021-09-26T22:37:27.54
IV.APEC.HHE. ML:1.1 0.0001087 0.12 AML other m 2021-09-26T22:37:28.84
IV.APEC.HHN. ML:0.9 0.000079 0.14 AML other m 2021-09-26T22:37:29.91
IV.APEC.HNE. ML:1.9 0.0007574048 1.1904 AML other m 2021-09-26T22:37:36.46
IV.APEC.HNN. ML:1.8 0.0006733971 0.768 AML other m 2021-09-26T22:37:32.23
IV.NARO.HHE. ML:0.8 0.000038757650000000007 0.064 AML other m 2021-09-26T22:37:30.43
IV.NARO.HHN. ML:0.9 0.00005713335 0.064 AML other m 2021-09-26T22:37:30.35
IV.SSP9.EHE. ML:1.0 0.00006512986 1.792 AML other m 2021-09-26T22:37:27.54
IV.SSP9.EHN. ML:1.0 0.00007586598 1.6768 AML other m 2021-09-26T22:37:33.40
IV.ATPI.EHE. ML:0.7 0.000026144075000000004 0.64 AML other m 2021-09-26T22:37:35.72
IV.ATPI.EHN. ML:0.7 0.000025780610000000003 0.8448 AML other m 2021-09-26T22:37:40.01
IV.ATPI.HNE. ML:1.4 0.00015005864999999998 1.3184 AML other m 2021-09-26T22:37:27.67
IV.ATPI.HNN. ML:1.6 0.00021580259999999998 0.512 AML other m 2021-09-26T22:37:39.74
IV.CRE.HHE. ML:0.8 0.000029392140000000002 1.1392 AML other m 2021-09-26T22:37:43.88
IV.CRE.HHN. ML:0.8 0.000027201005 1.5744 AML other m 2021-09-26T22:37:44.54
IV.FRON.EHE. ML:1.0 0.00003822365 1.1264 AML other m 2021-09-26T22:37:41.67
IV.FRON.EHN. ML:0.7 0.00002189589 0.0768 AML other m 2021-09-26T22:37:36.80
IV.ARVD.HHE. ML:1.1 0.00002815446 1.5744 AML other m 2021-09-26T22:37:31.39
IV.ARVD.HHN. ML:1.3 0.000051316045 1.7152 AML other m 2021-09-26T22:37:49.78
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