Earthquake with magnitude of ML 1.0 on date 17-11-2021 and time 23:56:02 (Italy) in region 5 km W Arquata del Tronto (AP)

A magnitude ML 1.0 earthquake occured in region: 5 km W Arquata del Tronto (AP), on

  • 17-11-2021 22:56:02 (UTC)
  • 17-11-2021 23:56:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.769, 13.238 at 8 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
Arquata del Tronto AP 5 1178 1178
Accumoli RI 8 667 1845
Montegallo AP 11 523 2368
Norcia PG 12 4957 7325
Acquasanta Terme AP 14 2916 10241
Castelsantangelo sul Nera MC 16 281 10522
Amatrice RI 16 2657 13179
Montemonaco AP 16 604 13783
Cittareale RI 18 482 14265
Cascia PG 19 3217 17482

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
48 Km N of L'Aquila (69753 inhabitants)
48 Km E of Foligno (57155 inhabitants)
54 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
95 Km NE of Guidonia Montecelio (88673 inhabitants)
96 Km NE of Tivoli (56533 inhabitants)
97 Km S of Ancona (100861 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-11-17
22:56:02
42.7687 13.2382 8 2021-11-17
23:01:36
Sala Sismica INGV-Roma 97531011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-17 22:56:02 ± 0.11
Latitude 42.7687 ± 0.0036
Longitude 13.2382 ± 0.0061
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97531011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 500
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30217
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 97531011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-17 23:01:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BOZZ.HNZ. 2021-11-17T22:57:29.74 3.0 undecidable manual Sg 2.35 0
IV.IFOR.HHZ. 2021-11-17T22:57:08.85 3.0 undecidable manual Sg 5.2 0
CR.ZAG.BHZ. 2021-11-17T22:56:58.16 3.0 positive manual Pg 1.9 0
IV.BRIS.HHZ. 2021-11-17T22:56:54.11 3.0 undecidable manual Sg -2.31 0
IV.POFI.HHZ. 2021-11-17T22:56:38.41 3.0 undecidable manual Sg -0.67 0
IV.TOLF.HHZ. 2021-11-17T22:56:36.39 3.0 undecidable manual Sg -5.54 0
OT.OT17.EHZ. 2021-11-17T22:56:28.45 3.0 positive manual Pn -4.47 0
IV.GUMA.HHZ. 2021-11-17T22:56:14.13 0.1 undecidable manual S 14 0.3022 104 -0.08 96
IV.MF5.EHZ. 2021-11-17T22:56:13.33 0.1 undecidable manual S 36 0.2725 105 0.22 92
IV.APEC.HHZ. 2021-11-17T22:56:12.56 3.0 positive manual P -8.55 0
IV.LNSS.HHZ. 2021-11-17T22:56:11.38 0.1 undecidable manual S 221 0.2203 109 0.2 95
IV.SMA1.EHZ. 2021-11-17T22:56:09.01 0.1 undecidable manual S 153 0.1556 115 0.15 96
IV.GUMA.HHZ. 2021-11-17T22:56:09.72 0.1 undecidable manual P 14 0.3022 104 0.57 83
IV.MC2.EHZ. 2021-11-17T22:56:08.76 0.1 undecidable manual S 346 0.1475 117 0.19 96
IV.MF5.EHZ. 2021-11-17T22:56:08.29 0.1 undecidable manual P 36 0.2725 105 -0.22 94
IV.MMO1.EHZ. 2021-11-17T22:56:08.49 0.1 undecidable manual S 26 0.1457 117 -0.03 99
IV.NRCA.HHZ. 2021-11-17T22:56:07.41 0.1 undecidable manual S 306 0.1115 124 0.03 100
IV.LNSS.HHZ. 2021-11-17T22:56:07.21 0.1 undecidable manual P 221 0.2203 109 -0.19 94
IV.MTRA.HNZ. 2021-11-17T22:56:07.64 0.1 undecidable manual S 96 0.1169 122 0.09 98
IV.MMO1.EHZ. 2021-11-17T22:56:05.74 0.1 undecidable manual P 26 0.1457 117 -0.12 98
IV.MTRA.HNZ. 2021-11-17T22:56:05.37 0.1 undecidable manual P 96 0.1169 122 0.07 98
IV.SMA1.EHZ. 2021-11-17T22:56:05.69 0.1 undecidable manual P 153 0.1556 115 -0.37 92
IV.MC2.EHZ. 2021-11-17T22:56:05.29 0.1 undecidable manual P 346 0.1475 117 -0.6 87
IV.NRCA.HHZ. 2021-11-17T22:56:05.38 0.1 positive manual P 306 0.1115 124 0.18 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.8 4.98E-5 0.42 AML other m 2021-11-17T22:56:06.11
IV.NRCA.HHN. ML:1 0.00013 0.9 AML other m 2021-11-17T22:56:08.72
IV.NRCA.HHE. ML:1.1 0.000144 0.66 AML other m 2021-11-17T22:56:08.01
IV.SMA1.EHN. ML:1 8.235E-5 1.58 AML other m 2021-11-17T22:56:10.19
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