Earthquake with magnitude of ML 1.6 on date 21-09-2020 and time 13:42:35 (UTC) in region 4 km E Leonessa (RI)

A magnitude ML 1.6 earthquake occured in region: 4 km E Leonessa (RI), on

  • 21-09-2020 13:42:35 (UTC)
  • 21-09-2020 15:42:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.58, 13.01 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.

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
Borbona RI 13 617 4345
Poggio Bustone RI 13 2055 6400
Polino TR 13 233 6633
Cittareale RI 13 482 7115
Rivodutri RI 14 1253 8368
Micigliano RI 15 127 8495
Cantalice RI 15 2755 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
30 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)
88 Km NE of Roma (2864731 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
99 Km W of Chieti (51815 inhabitants)
100 Km W of Pescara (121014 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2020-09-21
13:42:35
42.58 13.01 12 2020-09-21
13:50:58
Sala Sismica INGV-Roma 83105261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-21 13:42:35 ± 0.1
Latitude 42.58 ± 0.01
Longitude 13.01 ± 0.00
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 83105261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 816
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 820
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41549
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.7
Num. used stations 16
Type of magnitude ML
Reference to an origin 83105261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-21 13:50:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
XK.GIZZ.HHZ. 2020-09-21T13:44:32.80 3.0 undecidable manual Sn -2.47 0
IV.ORI.HHZ. 2020-09-21T13:44:30.93 3.0 undecidable manual Sg 13.01 0
CR.ZAG.BHZ. 2020-09-21T13:44:26.30 3.0 undecidable manual Sn 0.07 0
IV.CADC.HNZ. 2020-09-21T13:44:15.42 3.0 undecidable manual Sn -1.98 0
GU.BLANC.HHZ. 2020-09-21T13:44:15.48 3.0 undecidable manual Pg 16.309999 0
GU.LSD.HHZ. 2020-09-21T13:44:14.70 3.0 negative manual Pg 20.09 0
IV.HLNI.HHZ. 2020-09-21T13:44:06.13 3.0 undecidable manual Pg 8.31 0
IV.TEOL.HHZ. 2020-09-21T13:44:03.68 3.0 undecidable manual Sg 0.77 0
MN.TIR.HHZ. 2020-09-21T13:44:02.44 3.0 negative manual Pn 6.06 0
CH.DIX.HHZ. 2020-09-21T13:43:55.47 3.0 undecidable manual Pn -2.04 0
IV.SENA.HHZ. 2020-09-21T13:43:41.49 3.0 undecidable manual Pg 11.13 0
CR.ZAG.BHZ. 2020-09-21T13:43:39.50 3.0 positive manual Pn 1.38 0
OX.ACOM.HHZ. 2020-09-21T13:43:37.03 3.0 undecidable manual Pn -2.39 0
IV.AGLI.HHZ. 2020-09-21T13:43:24.65 3.0 undecidable manual Pn -3.01 0
IV.MCRV.HHZ. 2020-09-21T13:43:20.73 3.0 undecidable manual Pg 3.84 0
IV.FIR.HHZ. 2020-09-21T13:43:10.17 3.0 undecidable manual Pg 1.75 0
TV.SF04.EHZ. 2020-09-21T13:43:09.71 3.0 undecidable manual S -4.43 0
IV.RIBO.EHZ.01 2020-09-21T13:43:05.86 3.0 undecidable manual Pg 1.36 0
IV.ROSPO.HHZ. 2020-09-21T13:43:01.68 3.0 undecidable manual P -2.56 0
IV.MNTT.EHZ. 2020-09-21T13:42:49.15 3.0 positive manual P -2.37 0
IT.MTCL.HGZ. 2020-09-21T13:42:45.10 0.6 undecidable manual P 359 0.4155 91 0.69 40
IV.SMA1.EHZ. 2020-09-21T13:42:45.63 0.3 undecidable manual S 78 0.2473 93 -0.05 73
IV.RM33.EHZ. 2020-09-21T13:42:43.17 0.3 undecidable manual S 114 0.1682 97 -0.17 73
IV.ARRO.EHZ. 2020-09-21T13:42:43.60 0.3 undecidable manual S 270 0.1772 96 -0.02 74
IV.GAVE.EHZ. 2020-09-21T13:42:42.28 0.3 undecidable manual S 324 0.1403 103 -0.26 71
IV.SMA1.EHZ. 2020-09-21T13:42:41.55 0.1 undecidable manual P 78 0.2473 93 0.01 98
IV.RM33.EHZ. 2020-09-21T13:42:40.09 0.1 undecidable manual P 114 0.1682 97 -0.1 98
IV.LNSS.HHZ. 2020-09-21T13:42:40.14 0.3 undecidable manual S 45 0.0342 157 0.01 77
IV.ARRO.EHZ. 2020-09-21T13:42:40.39 0.1 positive manual P 270 0.1772 96 0.04 99
IV.GAVE.EHZ. 2020-09-21T13:42:39.70 0.1 positive manual P 324 0.1403 103 -0.03 99
IV.LNSS.HHZ. 2020-09-21T13:42:38.46 0.1 undecidable manual P 45 0.0342 157 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.5 0.0002485 0.48 AML other m 2020-09-21T13:42:42.65
IV.GAVE.EHE. ML:1.6 0.000306 0.72 AML other m 2020-09-21T13:42:42.47
IV.RM33.EHE. ML:1.2 0.0001185 0.64 AML other m 2020-09-21T13:42:43.89
IV.ARRO.EHE. ML:1.2 0.0001185 0.18 AML other m 2020-09-21T13:42:43.62
IV.RM33.EHN. ML:1.3 0.000147 0.26 AML other m 2020-09-21T13:42:44.06
IV.ARRO.EHN. ML:1.4 0.000169 0.18 AML other m 2020-09-21T13:42:44.20
IV.SMA1.EHN. ML:1.4 0.000144 1.7 AML other m 2020-09-21T13:42:46.97
IV.SMA1.EHE. ML:1.4 0.000135 0.68 AML other m 2020-09-21T13:42:46.50
IV.EL6.EHN. ML:1.4 3.63E-5 0.44 AML other m 2020-09-21T13:43:06.90
IV.FIR.HHE. ML:3.5 0.001089 0.06 AML other m 2020-09-21T13:43:14.28
IV.FIR.HHN. ML:3.1 0.000415 0.44 AML other m 2020-09-21T13:43:14.34
IV.EL6.EHE. ML:1.4 2.8695E-5 0.42 AML other m 2020-09-21T13:43:25.37
CR.ZAG.BHE. ML:4 0.000498 1.2 AML other m 2020-09-21T13:43:44.05
CR.ZAG.BHN. ML:4 0.0004195 0.2 AML other m 2020-09-21T13:44:04.75
IV.TEOL.HHE. ML:4.2 0.0013985 1.3 AML other m 2020-09-21T13:44:04.25
IV.TEOL.HHN. ML:4.1 0.00122 0.36 AML other m 2020-09-21T13:44:05.77
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download