Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 06-04-2021 and time 11:04:38 (Italy) in region 2 km W Monte Cavallo (MC)

A magnitude ML 1.7 earthquake occured in region: 2 km W Monte Cavallo (MC), on

  • 06-04-2021 09:04:38 (UTC)
  • 06-04-2021 11:04:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0010, 12.9730 at 12 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
Monte Cavallo MC 3 145 145
Pieve Torina MC 8 1458 1603
Serravalle di Chienti MC 8 1070 2673
Fiordimonte MC 10 202 2875
Muccia MC 11 915 3790
Pievebovigliana MC 12 866 4656
Visso MC 12 1107 5763
Sellano PG 13 1079 6842
Preci PG 15 724 7566
Ussita MC 15 444 8010
Fiastra MC 16 559 8569
Sefro MC 16 422 8991
Acquacanina MC 17 121 9112
Camerino MC 17 6974 16086
Valtopina PG 19 1398 17484
Castelsantangelo sul Nera MC 19 281 17765
Nocera Umbra PG 19 5839 23604
Pioraco MC 20 1134 24738

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km E of Foligno (57155 inhabitants)
49 Km E of Perugia (166134 inhabitants)
56 Km NE of Terni (111501 inhabitants)
71 Km NW of Teramo (54892 inhabitants)
80 Km NW of L'Aquila (69753 inhabitants)
82 Km SW of Ancona (100861 inhabitants)
94 Km S of Fano (60888 inhabitants)
96 Km NE of Viterbo (67173 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 1.7 2021-04-06
09:04:38		 43.0012 12.9728 12 2021-07-12
16:55:07		 Bollettino Sismico Italiano INGV 89332031
Reviewed
Rev100 		ML 1.7 2021-04-06
09:04:38		 43.0008 12.9753 13 2021-04-06
09:30:48		 Sala Sismica INGV-Roma 88818061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-06 09:04:38 ± 0.05
Latitude 43.0012 ± 0.0036
Longitude 12.9728 ± 0.0037
Depth (km) 12 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89332031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 249
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.30487
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 89332031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-21 14:29:06

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 88818061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-06 09:30:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-04-06T09:05:27.94 3.0 undecidable manual Pn -3.37 0
IV.CAGR.HHZ. 2021-04-06T09:05:21.67 3.0 undecidable manual Pn -2.61 0
IV.MSRU.HHZ. 2021-04-06T09:05:19.48 3.0 undecidable manual Pn -1.42 0
IV.MTGR.HHZ. 2021-04-06T09:05:15.33 3.0 positive manual Pn 0.33 0
IV.MCRV.HHZ. 2021-04-06T09:05:10.11 3.0 undecidable manual Pg 20.26 0
IX.STN3.HHZ.02 2021-04-06T09:05:09.06 3.0 undecidable manual Pg 13.34 0
IV.SGO.HHZ. 2021-04-06T09:05:05.40 3.0 undecidable manual Pg 12.25 0
IV.TRIV.HHZ. 2021-04-06T09:04:49.46 3.0 undecidable manual Pg 14.09 0
IV.ASSB.HHZ. 2021-04-06T09:04:48.19 0.3 undecidable manual S 280 25.8519 95 -0.13 71
IV.MC2.EHZ. 2021-04-06T09:04:47.04 0.3 undecidable manual S 119 20.1687 98 0.24 70
IV.NRCA.HHZ. 2021-04-06T09:04:47.07 0.6 undecidable manual S 148 21.867 97 -0.17 47
IV.CSP1.EHZ. 2021-04-06T09:04:46.99 0.1 undecidable manual S 62 21.3675 97 -0.12 95
IV.MMO1.EHZ. 2021-04-06T09:04:45.01 0.1 positive manual P 111 30.8469 93 -0.11 94
IV.ATCC.EHZ. 2021-04-06T09:04:45.57 0.1 positive manual P 307 33.8439 93 0 96
IV.FDMO.HHZ. 2021-04-06T09:04:44.17 0.6 undecidable manual S 67 10.0788 127 -0.12 48
IV.ASSB.HHZ. 2021-04-06T09:04:44.26 0.1 positive manual P 280 25.8519 95 -0.09 95
IV.MC2.EHZ. 2021-04-06T09:04:43.56 0.1 undecidable manual P 119 20.1687 98 0.08 96
IV.CESI.HHZ. 2021-04-06T09:04:43.64 0.6 undecidable manual S 274 5.5944 148 0.17 49
IV.NRCA.HHZ. 2021-04-06T09:04:43.63 0.1 positive manual P 148 21.867 97 -0.1 96
IV.CSP1.EHZ. 2021-04-06T09:04:43.73 0.1 undecidable manual P 62 21.3675 97 0.07 96
IT.MTCL.HGZ. 2021-04-06T09:04:43.01 0.3 undecidable manual S 110 2.2977 166 -0.13 73
IV.FDMO.HHZ. 2021-04-06T09:04:42.07 0.1 undecidable manual P 67 10.0788 127 0.04 99
IT.MTCL.HGZ. 2021-04-06T09:04:41.43 0.1 negative manual P 110 2.2977 166 0.07 100
IV.CESI.HHZ. 2021-04-06T09:04:41.79 0.1 negative manual P 274 5.5944 148 0.23 96
IV.BSSO.HHZ. 2021-04-06T09:04:39.15 3.0 positive manual Pn 1.2 0
IV.VVLD.HHZ. 2021-04-06T09:04:36.51 3.0 positive manual Pg 8.22 0
IV.PTRJ.HNZ. 2021-04-06T09:04:35.08 3.0 undecidable manual Pn -4.38 0
IV.CPGN.EHZ. 2021-04-06T09:04:29.28 3.0 undecidable manual Sg 6.12 0
SL.LJU.BHZ. 2021-04-06T09:04:18.77 3.0 negative manual Pn 1.92 0
IV.FREG.EHZ. 2021-04-06T09:04:03.09 3.0 positive manual Pg 5.52 0
IV.CPGN.EHZ. 2021-04-06T09:04:00.74 3.0 undecidable manual Pg 1.08 0
ST.CARE.EHZ. 2021-04-06T09:03:53.61 3.0 negative manual Pn -0.47 0
IV.IMOL.HNZ. 2021-04-06T09:03:51.33 3.0 positive manual Pg 0.91 0
IV.FIR.HHZ. 2021-04-06T09:03:50.44 3.0 undecidable manual Pn -2.95 0
GU.GORR.HHZ. 2021-04-06T09:03:45.60 3.0 undecidable manual P -0.78 0
IV.ZEN8.EHZ. 2021-04-06T09:03:42.73 3.0 undecidable manual P -0.58 0
IV.CADC.HNZ. 2021-04-06T09:03:39.62 3.0 positive manual P -0.16 0
IV.NDIM.HNZ. 2021-04-06T09:03:37.15 3.0 undecidable manual P -0.94 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.2 0.000029680075 0.9984 AML other m 2021-04-06T09:04:36.99
IV.CESI.HHE. ML:1.7 0.0006585 0.14 AML other m 2021-04-06T09:04:43.68
IV.CESI.HNE. ML:1.6 0.0006087331 0.128 AML other m 2021-04-06T09:04:43.69
IV.CESI.HHN. ML:1.9 0.0010934999999999999 0.16 AML other m 2021-04-06T09:04:43.83
IV.CESI.HNN. ML:1.9 0.00105352825 0.1728 AML other m 2021-04-06T09:04:43.83
IV.FDMO.HHE. ML:1.8 0.00066 0.14 AML other m 2021-04-06T09:04:44.32
IV.FDMO.HHN. ML:1.5 0.0003655 0.08 AML other m 2021-04-06T09:04:44.42
IV.NRCA.HHN. ML:1.7 0.0003435 0.14 AML other m 2021-04-06T09:04:47.23
IV.CSP1.EHN. ML:1.8 0.000388 0.14 AML other m 2021-04-06T09:04:47.33
IV.NRCA.HHE. ML:1.6 0.0002845 0.08 AML other m 2021-04-06T09:04:47.44
IV.CSP1.EHE. ML:1.8 0.00043752880000000007 1.7376 AML other m 2021-04-06T09:04:47.06
IV.ASSB.HHN. ML:1.0 0.000051959455 0.2368 AML other m 2021-04-06T09:04:48.46
IV.RM33.EHE. ML:1.4 0.000050835385 0.7968 AML other m 2021-04-06T09:04:50.05
IV.ASSB.HHE. ML:1.0 0.000055036105 0.1408 AML other m 2021-04-06T09:04:50.32
IV.ATCC.EHN. ML:1.0 0.000041003945 0.9984 AML other m 2021-04-06T09:05:01.05
IV.NRCA.HNN. ML:1.7 0.00035180877 0.7296 AML other m 2021-04-06T09:05:08.57
IV.NRCA.HNE. ML:1.7 0.00031370850250000005 0.8128 AML other m 2021-04-06T09:05:08.59
IV.ATCC.EHE. ML:0.9 0.00003161353 0.6208 AML other m 2021-04-06T09:05:17.03
IV.OFFI.HHN. ML:1.8 0.0001456977 0.6016 AML other m 2021-04-06T09:05:17.60
IV.OFFI.HHE. ML:1.8 0.00012140455 0.4608 AML other m 2021-04-06T09:05:17.70
IV.RM33.HNE. ML:1.9 0.000161374095 0.576 AML other m 2021-04-06T09:05:27.84
IV.RM33.HNN. ML:2.0 0.00019321079999999998 1.0784 AML other m 2021-04-06T09:05:33.96
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