Earthquake with magnitude of ML 1.0 on date 19-10-2021 and time 23:16:28 (UTC) in region 5 km NE Cittareale (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km NE Cittareale (RI), on

  • 19-10-2021 23:16:28 (UTC)
  • 20-10-2021 01:16:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.662, 13.183 at 11 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
Cittareale RI 5 482 482
Accumoli RI 7 667 1149
Amatrice RI 9 2657 3806
Cascia PG 15 3217 7023
Arquata del Tronto AP 16 1178 8201
Montereale AQ 16 2581 10782
Norcia PG 16 4957 15739
Posta RI 17 694 16433
Borbona RI 17 617 17050
Capitignano AQ 18 665 17715
Monteleone di Spoleto PG 19 599 18314
Campotosto AQ 19 542 18856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
45 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km W of Chieti (51815 inhabitants)
92 Km E of Viterbo (67173 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 2021-10-19
23:16:28
42.6623 13.1832 11 2021-10-19
23:28:05
Sala Sismica INGV-Roma 96776191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 23:16:28 ± 0.06
Latitude 42.6623 ± 0.0045
Longitude 13.1832 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96776191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 483
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 165
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) 69
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38311
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96776191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 23:28:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-10-19T23:16:54.93 3.0 undecidable manual S -0.37 0
IV.MF5.EHN. 2021-10-19T23:16:43.53 0.3 undecidable manual S 32 0.3831 50 0.99 56
IV.ARRO.EHZ. 2021-10-19T23:16:40.59 0.3 undecidable manual S 255 0.3184 50 -0.02 72
IV.TERO.HHZ. 2021-10-19T23:16:39.91 0.1 undecidable manual S 97 0.3121 50 -0.52 84
IV.MC2.EHZ. 2021-10-19T23:16:38.68 0.3 undecidable manual S 1 0.2491 50 0.12 74
IV.MMO1.EHZ. 2021-10-19T23:16:38.68 0.3 undecidable manual S 24 0.259 50 -0.19 69
IV.MF5.EHN. 2021-10-19T23:16:37.08 0.3 undecidable manual P 32 0.3831 50 0.38 68
IV.GAVE.EHZ. 2021-10-19T23:16:37.60 0.3 undecidable manual S 278 0.214 50 0.06 74
IV.RM33.EHZ. 2021-10-19T23:16:35.62 0.3 undecidable manual S 171 0.1547 50 -0.17 73
IV.NRCA.HHZ. 2021-10-19T23:16:35.94 0.3 undecidable manual S 344 0.1781 50 -0.54 64
IV.TERO.HHZ. 2021-10-19T23:16:35.18 0.1 undecidable manual P 97 0.3121 50 -0.3 90
IV.ARRO.EHZ. 2021-10-19T23:16:35.58 0.1 undecidable manual P 255 0.3184 50 -0.01 96
IV.MMO1.EHZ. 2021-10-19T23:16:34.49 0.1 undecidable manual P 24 0.259 50 -0.08 95
IV.SMA1.EHZ. 2021-10-19T23:16:34.66 0.1 undecidable manual S 106 0.116 130 0.06 99
IV.LNSS.HHZ. 2021-10-19T23:16:34.79 0.3 undecidable manual S 240 0.1205 129 0.07 74
IV.MC2.EHZ. 2021-10-19T23:16:34.43 0.1 undecidable manual P 1 0.2491 50 0.03 98
IV.T1299.EHZ. 2021-10-19T23:16:33.62 0.1 undecidable manual S 111 0.0782 142 0.05 100
IV.NRCA.HHZ. 2021-10-19T23:16:33.02 0.1 undecidable manual P 344 0.1781 50 -0.17 95
IV.GAVE.EHZ. 2021-10-19T23:16:33.79 0.1 undecidable manual P 278 0.214 50 -0.02 98
IV.LNSS.HHZ. 2021-10-19T23:16:32.37 0.1 undecidable manual P 240 0.1205 129 0.19 97
IV.RM33.EHZ. 2021-10-19T23:16:32.81 0.1 undecidable manual P 171 0.1547 50 0.02 100
IV.SMA1.EHZ. 2021-10-19T23:16:32.28 0.1 undecidable manual P 106 0.116 130 0.17 98
IV.T1299.EHZ. 2021-10-19T23:16:31.74 0.1 undecidable manual P 111 0.0782 142 0.23 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.3 0.0001929632 0.1792 AML other m 2021-10-19T23:16:35.13
IV.SMA1.EHN. ML:1.3 0.0002035 0.38 AML other m 2021-10-19T23:16:35.19
IV.LNSS.HHN. ML:0.8 6.60065E-5 0.1664 AML other m 2021-10-19T23:16:35.73
IV.LNSS.HHE. ML:0.9 7.26E-5 0.18 AML other m 2021-10-19T23:16:35.83
IV.NRCA.HHE. ML:1.1 9.34E-5 0.46 AML other m 2021-10-19T23:16:36.44
IV.NRCA.HHN. ML:1 6.99E-5 0.08 AML other m 2021-10-19T23:16:36.61
IV.GAVE.EHE. ML:0.8 3.5802985E-5 0.128 AML other m 2021-10-19T23:16:38.17
IV.GAVE.EHN. ML:0.8 3.126813E-5 0.256 AML other m 2021-10-19T23:16:37.77
IV.RM33.EHE. ML:0 2.2190835E-5 0.1152 AML other m 2021-10-19T23:16:36.52
IV.RM33.EHN. ML:0 3.082904E-5 0.1664 AML other m 2021-10-19T23:16:36.08
IV.NRCA.HNE. ML:0 9.255435E-5 0.128 AML other m 2021-10-19T23:16:36.44
IV.NRCA.HNN. ML:0 0.000171054705 0.6784 AML other m 2021-10-19T23:16:44.97
IV.TERO.HHN. ML:0 2.1978305E-5 0.0512 AML other m 2021-10-19T23:16:40.12
IV.ARRO.EHE. ML:0 1.2022372E-5 0.1408 AML other m 2021-10-19T23:16:41.77
IV.ARRO.EHN. ML:0 1.34760795E-5 0.2432 AML other m 2021-10-19T23:16:43.10
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