Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 16-07-2020 and time 20:30:36 (UTC) in region 7 km N Cittareale (RI)

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

  • 16-07-2020 20:30:36 (UTC)
  • 16-07-2020 22:30:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6850, 13.1590 at 14 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
Accumoli RI 7 667 667
Cittareale RI 7 482 1149
Amatrice RI 12 2657 3806
Cascia PG 13 3217 7023
Norcia PG 13 4957 11980
Arquata del Tronto AP 15 1178 13158
Monteleone di Spoleto PG 17 599 13757
Poggiodomo PG 19 117 13874
Posta RI 19 694 14568
Montereale AQ 19 2581 17149
Borbona RI 19 617 17766

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of L'Aquila (69753 inhabitants)
44 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
48 Km SE of Foligno (57155 inhabitants)
78 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km W of Chieti (51815 inhabitants)
91 Km E 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
Reviewed
Rev100 		ML 1.0 2020-07-16
20:30:36		 42.685 13.1593 14 2020-07-16
20:34:37		 Sala Sismica INGV-Roma 81082881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-16 20:30:36 ± 0.19
Latitude 42.6850 ± 0.0099
Longitude 13.1593 ± 0.0073
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81082881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1069
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 191
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 201
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.22753
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 81082881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-16 20:34:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.EHZ. 2020-07-16T20:30:44.24 0.6 undecidable manual S 167 20.0688 109 -0.24 47
IV.GAVE.EHZ. 2020-07-16T20:30:44.58 0.6 undecidable manual S 272 21.6672 107 -0.31 46
IV.LNSS.HHZ. 2020-07-16T20:30:43.06 0.3 undecidable manual S 227 13.2756 124 0.19 74
IV.SMA1.EHZ. 2020-07-16T20:30:43.28 0.3 undecidable manual S 113 15.5733 118 -0.11 74
IV.T1299.EHN. 2020-07-16T20:30:42.30 0.3 undecidable manual S 119 11.4774 130 -0.19 74
IV.RM33.EHZ. 2020-07-16T20:30:41.19 0.6 positive manual P 167 20.0688 109 0.06 50
IV.GAVE.EHZ. 2020-07-16T20:30:41.29 0.1 positive manual P 272 21.6672 107 -0.07 97
IV.LNSS.HHZ. 2020-07-16T20:30:40.30 0.1 positive manual P 227 13.2756 124 0.1 100
IV.T1299.EHN. 2020-07-16T20:30:40.04 0.1 undecidable manual P 119 11.4774 130 0.07 100
IV.SMA1.EHZ. 2020-07-16T20:30:40.67 0.1 undecidable manual P 113 15.5733 118 0.18 97
IV.MC2.EHZ. 2020-07-16T20:30:36.51 1.0 negative manual P 25.2525 -5.39 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHN. ML:1.1 0.00011965000000000001 1.44 AML other m 2020-07-16T20:30:43.11
IV.LNSS.HHE. ML:1.0 0.0000953 0.36 AML other m 2020-07-16T20:30:43.34
IV.SMA1.EHE. ML:1.1 0.00009889999999999999 0.66 AML other m 2020-07-16T20:30:43.81
IV.SMA1.EHN. ML:1.0 0.0000917 0.32 AML other m 2020-07-16T20:30:43.84
IV.GAVE.EHN. ML:1.0 0.0000539 0.12 AML other m 2020-07-16T20:30:45.36
IV.RM33.EHN. ML:0.8 0.000038400000000000005 1.5 AML other m 2020-07-16T20:30:46.08
IV.GAVE.EHE. ML:1.0 0.00007075000000000001 0.24 AML other m 2020-07-16T20:30:46.07
IV.RM33.EHE. ML:0.7 0.00003325 1.06 AML other m 2020-07-16T20:30:46.61
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