Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 07-08-2020 and time 11:08:54 (Italy) in region 4 km E Leonessa (RI)

A magnitude ML 1.1 earthquake occured in region: 4 km E Leonessa (RI), on

  • 07-08-2020 09:08:54 (UTC)
  • 07-08-2020 11:08:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5770, 13.0040 at 13 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
Leonessa RI 4 2435 2435
Monteleone di Spoleto PG 9 599 3034
Posta RI 10 694 3728
Poggio Bustone RI 13 2055 5783
Borbona RI 13 617 6400
Polino TR 13 233 6633
Cittareale RI 14 482 7115
Rivodutri RI 14 1253 8368
Cantalice RI 15 2755 11123
Micigliano RI 15 127 11250
Morro Reatino RI 15 373 11623
Cascia PG 16 3217 14840
Poggiodomo PG 16 117 14957
Labro RI 18 374 15331
Ferentillo TR 18 1913 17244
Antrodoco RI 19 2588 19832
Arrone TR 19 2763 22595
Borgo Velino RI 20 972 23567
Montefranco TR 20 1276 24843

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Terni (111501 inhabitants)
41 Km NW of L'Aquila (69753 inhabitants)
49 Km SE of Foligno (57155 inhabitants)
58 Km W of Teramo (54892 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
70 Km N of Tivoli (56533 inhabitants)
76 Km E of Viterbo (67173 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
87 Km NE of Roma (2864731 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
99 Km W of Chieti (51815 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 1.1 2020-08-07
09:08:54		 42.577 13.0037 13 2020-08-07
09:13:26		 Sala Sismica INGV-Roma 81729331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-07 09:08:54 ± 0.13
Latitude 42.5770 ± 0.0081
Longitude 13.0037 ± 0.0073
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81729331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 725
Semi-minor axis of confidence ellipse (meter) 625
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.03777
Epicentral distance of station farthest from the epicenter (degree) 0.44426
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 81729331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-07 09:13:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2020-08-07T09:09:04.15 0.6 undecidable manual S 78 27.75 97 0.25 47
IV.NRCA.HHZ. 2020-08-07T09:09:04.16 0.3 undecidable manual S 18 29.8479 96 -0.3 70
IV.TERO.HHZ. 2020-08-07T09:09:02.79 1.0 negative manual P 84 49.3173 93 -0.24 23
IV.RM33.EHZ. 2020-08-07T09:09:01.29 0.1 undecidable manual S 114 18.87 106 -0.28 96
IV.ARRO.EHZ. 2020-08-07T09:09:01.22 0.3 undecidable manual S 271 19.4694 105 -0.5 69
IV.NRCA.HHZ. 2020-08-07T09:09:00.07 0.1 undecidable manual P 18 29.8479 96 0.03 99
IV.GAVE.HNZ. 2020-08-07T09:09:00.82 0.3 undecidable manual S 325 15.5733 113 0.07 75
IV.SMA1.EHZ. 2020-08-07T09:08:59.84 0.3 undecidable manual P 78 27.75 97 0.12 73
IV.LNSS.HHZ. 2020-08-07T09:08:58.47 0.3 undecidable manual S 46 4.1958 158 -0.1 76
IV.GAVE.HNZ. 2020-08-07T09:08:58.09 0.6 undecidable manual P 325 15.5733 113 0.19 49
IV.RM33.EHZ. 2020-08-07T09:08:58.41 0.3 positive manual P 114 18.87 106 0.04 75
IV.ARRO.EHZ. 2020-08-07T09:08:58.81 0.1 positive manual P 271 19.4694 105 0.35 94
IV.LNSS.HHZ. 2020-08-07T09:08:56.85 0.1 negative manual P 46 4.1958 158 0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.6 0.0005905 0.12 AML other m 2020-08-07T09:08:58.61
IV.LNSS.HHN. ML:1.4 0.0003325 1.14 AML other m 2020-08-07T09:08:59.08
IV.RM33.EHE. ML:1.0 0.00007075000000000001 1.34 AML other m 2020-08-07T09:09:01.70
IV.ARRO.EHE. ML:1.2 0.0001032 0.76 AML other m 2020-08-07T09:09:02.08
IV.RM33.EHN. ML:1.0 0.0000649 0.26 AML other m 2020-08-07T09:09:02.36
IV.ARRO.EHN. ML:1.2 0.00010089999999999999 0.1 AML other m 2020-08-07T09:09:02.41
IV.NRCA.HHE. ML:1.1 0.000053849999999999994 0.58 AML other m 2020-08-07T09:09:04.64
IV.NRCA.HHN. ML:0.9 0.000041049999999999995 0.64 AML other m 2020-08-07T09:09:06.34
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