Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 04-06-2021 and time 20:23:13 (Italy) in region 7 km NW Cittareale (RI)

A magnitude ML 1.0 earthquake occured in region: 7 km NW Cittareale (RI), on

  • 04-06-2021 18:23:13 (UTC)
  • 04-06-2021 20:23:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6670, 13.1050 at 12 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
Cittareale RI 7 482 482
Cascia PG 9 3217 3699
Accumoli RI 12 667 4366
Monteleone di Spoleto PG 13 599 4965
Norcia PG 14 4957 9922
Poggiodomo PG 15 117 10039
Amatrice RI 16 2657 12696
Posta RI 16 694 13390
Leonessa RI 16 2435 15825
Borbona RI 17 617 16442
Montereale AQ 20 2581 19023
Arquata del Tronto AP 20 1178 20201

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Terni (111501 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
49 Km W of Teramo (54892 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
86 Km E of Viterbo (67173 inhabitants)
87 Km W of Montesilvano (53738 inhabitants)
94 Km W of Pescara (121014 inhabitants)
94 Km W of Chieti (51815 inhabitants)
100 Km NE of Roma (2864731 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 2021-06-04
18:23:13		 42.6667 13.1047 12 2021-06-04
18:32:42		 Sala Sismica INGV-Roma 90798271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-04 18:23:13 ± 0.06
Latitude 42.6667 ± 0.0036
Longitude 13.1047 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90798271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 379
Semi-minor axis of confidence ellipse (meter) 80
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 141
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36962
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.4
Num. used stations 24
Type of magnitude ML
Reference to an origin 90798271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-04 18:32:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2021-06-04T18:23:48.05 3.0 undecidable manual S -0.07 0
IV.FDMO.HHZ. 2021-06-04T18:23:27.30 0.3 undecidable manual S 358 41.0256 91 0.34 68
IV.TERO.HHZ. 2021-06-04T18:23:26.66 0.6 undecidable manual S 97 41.0256 91 -0.29 46
IV.ARRO.EHZ. 2021-06-04T18:23:24.08 0.6 undecidable manual S 251 29.3484 92 0.25 47
IV.MTRA.EHN. 2021-06-04T18:23:22.70 0.6 undecidable manual S 67 25.752 93 -0.18 48
IV.FDMO.HHZ. 2021-06-04T18:23:21.24 0.1 undecidable manual P 358 41.0256 91 -0.04 96
IV.RM33.EHZ. 2021-06-04T18:23:21.09 0.6 undecidable manual S 153 19.6692 95 -0.16 49
IV.TERO.HHZ. 2021-06-04T18:23:21.07 0.1 undecidable manual P 97 41.0256 91 -0.21 93
IV.SMA1.EHE. 2021-06-04T18:23:21.61 0.6 undecidable manual S 102 19.2696 95 0.47 45
IV.NRCA.HHZ. 2021-06-04T18:23:20.85 0.6 undecidable manual S 2 18.5703 96 -0.1 49
IV.GAVE.HNZ. 2021-06-04T18:23:20.59 1.0 undecidable manual S 279 17.3715 98 -0.06 25
IV.LNSS.HHZ. 2021-06-04T18:23:18.67 0.6 undecidable manual S 217 8.7801 130 0.13 49
IV.SMA1.EHE. 2021-06-04T18:23:18.16 0.1 undecidable manual P 102 19.2696 95 0.23 96
IV.ARRO.EHZ. 2021-06-04T18:23:18.95 1.0 undecidable manual P 251 29.3484 92 -0.52 22
IV.MTRA.EHN. 2021-06-04T18:23:18.93 0.1 undecidable manual P 67 25.752 93 -0.01 99
IV.RM33.EHZ. 2021-06-04T18:23:17.95 0.1 undecidable manual P 153 19.6692 95 -0.04 100
IV.GAVE.HNZ. 2021-06-04T18:23:17.28 0.6 undecidable manual P 279 17.3715 98 -0.36 47
IV.NRCA.HHZ. 2021-06-04T18:23:17.90 0.1 undecidable manual P 2 18.5703 96 0.08 99
IV.LNSS.HHZ. 2021-06-04T18:23:16.39 1.0 undecidable manual P 217 8.7801 130 -0.04 26
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.4 0.0003085 1.88 AML other m 2021-06-04T18:23:19.98
IV.LNSS.HHN. ML:1.1 0.00017016825000000003 0.1408 AML other m 2021-06-04T18:23:19.14
IV.NRCA.HHN. ML:0.8 0.000052400755 0.1024 AML other m 2021-06-04T18:23:21.84
IV.NRCA.HHE. ML:0.9 0.00006745 0.12 AML other m 2021-06-04T18:23:21.24
IV.RM33.EHN. ML:0.8 0.00003875 0.3 AML other m 2021-06-04T18:23:21.59
IV.RM33.EHE. ML:0.6 0.000031521525 0.2048 AML other m 2021-06-04T18:23:22.61
IV.LNSS.HNE. ML:1.3 0.00026996675000000005 0.1152 AML other m 2021-06-04T18:23:19.05
IV.LNSS.HNN. ML:1.1 0.00015809955 0.128 AML other m 2021-06-04T18:23:19.21
IV.GAVE.EHE. ML:0.6 0.000031615119999999996 0.2176 AML other m 2021-06-04T18:23:21.54
IV.GAVE.EHN. ML:0.6 0.00003571472000000001 0.1792 AML other m 2021-06-04T18:23:20.92
IV.GAVE.HNE. ML:1.4 0.000203001355 0.5248 AML other m 2021-06-04T18:23:19.19
IV.GAVE.HNN. ML:1.3 0.00014740198500000002 0.8832 AML other m 2021-06-04T18:23:28.04
IV.NRCA.HNE. ML:1.2 0.00012108106 0.5632 AML other m 2021-06-04T18:23:23.55
IV.NRCA.HNN. ML:1.3 0.00014349709 1.024 AML other m 2021-06-04T18:23:26.16
IV.RM33.HNE. ML:1.1 0.000093569345 0.9344 AML other m 2021-06-04T18:23:24.46
IV.RM33.HNN. ML:1.1 0.00009970701000000001 0.512 AML other m 2021-06-04T18:23:20.99
IV.ARRO.EHE. ML:0.5 0.00001285743 0.1792 AML other m 2021-06-04T18:23:28.26
IV.ARRO.EHN. ML:0.6 0.000020273395 0.256 AML other m 2021-06-04T18:23:24.87
IV.TERO.HHE. ML:1.6 0.00013773549000000002 0.6016 AML other m 2021-06-04T18:23:25.82
IV.TERO.HHN. ML:0.5 0.000008639367 0.064 AML other m 2021-06-04T18:23:26.79
IV.TERO.HNE. ML:1.6 0.00012436978 0.7168 AML other m 2021-06-04T18:23:28.63
IV.TERO.HNN. ML:1.7 0.00015608361 0.7552 AML other m 2021-06-04T18:23:39.19
IV.FDMO.HHE. ML:0.2 0.0000061242635 0.192 AML other m 2021-06-04T18:23:27.53
IV.FDMO.HHN. ML:0.2 0.0000058885925 0.32 AML other m 2021-06-04T18:23:28.24
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