Earthquake with magnitude of ML 1.0 on date 22-09-2021 and time 17:22:47 (UTC) in region 4 km E Leonessa (RI)

A magnitude ML 1.0 earthquake occured in region: 4 km E Leonessa (RI), on

  • 22-09-2021 17:22:47 (UTC)
  • 22-09-2021 19:22:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.566, 13.014 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.

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
Posta RI 8 694 3129
Monteleone di Spoleto PG 11 599 3728
Borbona RI 11 617 4345
Poggio Bustone RI 13 2055 6400
Micigliano RI 13 127 6527
Cittareale RI 13 482 7009
Cantalice RI 14 2755 9764
Rivodutri RI 14 1253 11017
Polino TR 14 233 11250
Morro Reatino RI 15 373 11623
Cascia PG 17 3217 14840
Antrodoco RI 17 2588 17428
Poggiodomo PG 18 117 17545
Labro RI 18 374 17919
Borgo Velino RI 18 972 18891
Castel Sant'Angelo RI 19 1308 20199
Ferentillo TR 19 1913 22112
Montereale AQ 20 2581 24693

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Terni (111501 inhabitants)
40 Km NW of L'Aquila (69753 inhabitants)
50 Km SE of Foligno (57155 inhabitants)
58 Km W of Teramo (54892 inhabitants)
67 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km N of Tivoli (56533 inhabitants)
76 Km E of Viterbo (67173 inhabitants)
79 Km SE of Perugia (166134 inhabitants)
87 Km NE of Roma (2864731 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
98 Km W of Chieti (51815 inhabitants)
99 Km W of Pescara (121014 inhabitants)
100 Km N of Velletri (53303 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.0 2021-09-22
17:22:47
42.5662 13.0137 13 2021-09-22
17:32:06
Sala Sismica INGV-Roma 95749821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 17:22:47 ± 0.08
Latitude 42.5662 ± 0.0045
Longitude 13.0137 ± 0.0049
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 95749821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 479
Semi-minor axis of confidence ellipse (meter) 74
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 16
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) 0.43797
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 95749821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 17:32:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ORZI.HHZ. 2021-09-22T17:24:36.44 3.0 undecidable manual Sg 10.32 0
IV.FREG.EHZ. 2021-09-22T17:24:22.00 3.0 undecidable manual Sn -0.53 0
IV.CET2.HHZ. 2021-09-22T17:23:56.95 3.0 undecidable manual Pg 10.27 0
GU.RNCA.HHZ. 2021-09-22T17:23:54.80 3.0 undecidable manual Pg 12.46 0
IV.ILOS.HHZ. 2021-09-22T17:23:54.18 3.0 negative manual Pn -1.05 0
IV.QLNO.HHZ. 2021-09-22T17:23:50.38 3.0 negative manual Pn 3.68 0
IV.VOBA.EHZ. 2021-09-22T17:23:46.78 3.0 negative manual Pn 4.1 0
IV.FREG.EHZ. 2021-09-22T17:23:38.94 3.0 positive manual Pn -2.35 0
IX.SCL3.EHZ.02 2021-09-22T17:23:32.06 3.0 negative manual Pn 0.82 0
IV.MCRV.HHZ. 2021-09-22T17:23:25.12 3.0 undecidable manual Pn -2.84 0
IV.ICAI.EHZ. 2021-09-22T17:23:22.12 3.0 negative manual Pn -0.09 0
IV.BRSN.HNZ. 2021-09-22T17:23:21.59 3.0 positive manual Pg 2.61 0
IV.ATFO.HHZ. 2021-09-22T17:23:13.76 3.0 undecidable manual S -3.23 0
IV.LPEL.HHZ. 2021-09-22T17:23:05.85 3.0 positive manual P -2.76 0
IV.FIAM.HNZ. 2021-09-22T17:22:59.56 0.6 undecidable manual S 166 0.3076 94 0.06 48
IV.NRCA.HHZ. 2021-09-22T17:22:58.27 0.3 undecidable manual S 15 0.277 95 -0.33 69
IV.SMA1.EHZ. 2021-09-22T17:22:57.73 0.6 undecidable manual S 75 0.2455 96 0.07 49
IV.TERO.HHZ. 2021-09-22T17:22:56.64 0.6 undecidable manual P 82 0.438 92 -0.19 46
IV.RM33.EHZ. 2021-09-22T17:22:55.03 0.6 undecidable manual S 111 0.1583 106 -0.1 50
IV.ARRO.EHZ. 2021-09-22T17:22:55.73 0.3 undecidable manual S 274 0.1826 101 -0.1 74
IV.GAVE.HNN. 2021-09-22T17:22:55.02 0.6 undecidable manual S 325 0.1538 107 0.03 50
IV.NRCA.HHZ. 2021-09-22T17:22:54.00 0.1 undecidable manual P 15 0.277 95 -0.09 97
IV.FIAM.HNZ. 2021-09-22T17:22:54.18 0.1 undecidable manual P 166 0.3076 94 -0.42 90
IV.SMA1.EHZ. 2021-09-22T17:22:53.73 0.1 positive manual P 75 0.2455 96 0.19 96
IV.LNSS.HHZ. 2021-09-22T17:22:52.44 0.3 undecidable manual S 28 0.0414 155 0 77
IV.T1299.EHE. 2021-09-22T17:22:52.96 0.1 undecidable manual P 71 0.2086 99 0.04 99
IV.RM33.EHZ. 2021-09-22T17:22:52.24 0.1 undecidable manual P 111 0.1583 106 0.16 98
IV.ARRO.EHZ. 2021-09-22T17:22:52.87 0.1 undecidable manual P 274 0.1826 101 0.38 93
IV.GAVE.HNN. 2021-09-22T17:22:51.94 0.1 undecidable manual P 325 0.1538 107 -0.06 100
IV.LNSS.HHZ. 2021-09-22T17:22:50.75 0.3 undecidable manual P 28 0.0414 155 0.22 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0 0.000339 0.9 AML other m 2021-09-22T17:22:52.49
IV.LNSS.HHN. ML:0 0.000261 0.92 AML other m 2021-09-22T17:22:52.96
IV.ARRO.EHE. ML:0 5.35E-5 0.2 AML other m 2021-09-22T17:22:56.31
IV.ARRO.EHN. ML:0 5.38E-5 0.14 AML other m 2021-09-22T17:22:57.10
IV.SMA1.EHN. ML:0.9 3.925E-5 0.62 AML other m 2021-09-22T17:22:58.35
IV.SMA1.EHE. ML:0.8 3.32E-5 0.66 AML other m 2021-09-22T17:22:58.91
IV.NRCA.HHE. ML:0 5.86E-5 0.42 AML other m 2021-09-22T17:22:59.35
IV.NRCA.HHN. ML:0 4.87E-5 0.1 AML other m 2021-09-22T17:22:59.76
IV.LNSS.HNE. ML:1.3 0.0002954847 0.1536 AML other m 2021-09-22T17:22:52.57
IV.LNSS.HNN. ML:1.2 0.00020822302 0.2048 AML other m 2021-09-22T17:22:52.96
IV.RM33.EHE. ML:0.8 4.929143E-5 0.1664 AML other m 2021-09-22T17:22:55.40
IV.RM33.EHN. ML:0.7 3.788742E-5 0.1408 AML other m 2021-09-22T17:22:55.26
IV.RM33.HNE. ML:1 7.5017195E-5 0.7168 AML other m 2021-09-22T17:22:55.39
IV.RM33.HNN. ML:1 6.7570426E-5 0.2816 AML other m 2021-09-22T17:22:55.17
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