Earthquake with magnitude of ML 1.4 on date 28-11-2021 and time 05:42:40 (UTC) in region 7 km W Arquata del Tronto (AP)

A magnitude ML 1.4 earthquake occured in region: 7 km W Arquata del Tronto (AP), on

  • 28-11-2021 05:42:40 (UTC)
  • 28-11-2021 06:42:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.798, 13.223 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
Arquata del Tronto AP 7 1178 1178
Montegallo AP 10 523 1701
Norcia PG 11 4957 6658
Accumoli RI 12 667 7325
Castelsantangelo sul Nera MC 12 281 7606
Montemonaco AP 14 604 8210
Acquasanta Terme AP 16 2916 11126
Preci PG 18 724 11850
Ussita MC 18 444 12294
Visso MC 18 1107 13401
Montefortino FM 19 1178 14579
Cascia PG 19 3217 17796
Amatrice RI 20 2657 20453

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
52 Km N of L'Aquila (69753 inhabitants)
54 Km E of Terni (111501 inhabitants)
76 Km E of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
92 Km NW of Chieti (51815 inhabitants)
94 Km S of Ancona (100861 inhabitants)
98 Km NE of Guidonia Montecelio (88673 inhabitants)
99 Km NE of Tivoli (56533 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 1.4 2021-11-28
05:42:40
42.7983 13.2227 12 2021-11-28
06:21:46
Sala Sismica INGV-Roma 97893221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-28 05:42:40 ± 0.07
Latitude 42.7983 ± 0.0027
Longitude 13.2227 ± 0.0049
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 97893221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 437
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 0.31117
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 97893221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-28 06:21:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HHZ. 2021-11-28T05:42:52.10 0.6 undecidable manual S 312 0.3112 93 0.21 47
IV.CSP1.EHZ. 2021-11-28T05:42:51.35 0.3 undecidable manual S 357 0.2932 93 -0.03 72
IV.FDMO.HHZ. 2021-11-28T05:42:50.14 0.6 undecidable manual S 337 0.2581 94 -0.17 47
IV.MF5.EHZ. 2021-11-28T05:42:50.98 0.6 undecidable manual S 42 0.2572 94 0.69 42
IV.LNSS.HHZ. 2021-11-28T05:42:49.88 0.6 undecidable manual S 214 0.2365 95 0.19 47
IT.MTCL.HGZ. 2021-11-28T05:42:49.98 0.3 undecidable manual S 320 0.2545 94 -0.25 70
IV.SMA1.EHZ. 2021-11-28T05:42:47.91 0.6 undecidable manual S 154 0.1871 98 -0.32 47
IV.MF5.EHZ. 2021-11-28T05:42:46.31 1.0 negative manual P 42 0.2572 94 0.28 24
IV.CSP1.EHZ. 2021-11-28T05:42:46.55 0.1 negative manual P 357 0.2932 93 -0.11 96
IV.CESI.HHZ. 2021-11-28T05:42:46.97 0.1 undecidable manual P 312 0.3112 93 0.01 98
IV.MMO1.EHZ. 2021-11-28T05:42:46.22 0.3 undecidable manual S 37 0.1268 111 -0.27 71
IV.MC2.EHZ. 2021-11-28T05:42:46.28 0.3 undecidable manual S 348 0.116 116 0.09 75
IT.MTCL.HGZ. 2021-11-28T05:42:45.87 0.6 undecidable manual P 320 0.2545 94 -0.12 48
IV.NRCA.HHZ. 2021-11-28T05:42:45.43 0.3 undecidable manual S 294 0.0872 129 -0.04 77
IV.FDMO.HHZ. 2021-11-28T05:42:45.89 0.3 negative manual P 337 0.2581 94 -0.16 72
IV.LNSS.HHZ. 2021-11-28T05:42:45.77 0.6 undecidable manual P 214 0.2365 95 0.08 48
IV.SMA1.EHZ. 2021-11-28T05:42:44.83 0.1 negative manual P 154 0.1871 98 -0.01 100
IV.MMO1.EHZ. 2021-11-28T05:42:43.75 1.0 undecidable manual P 37 0.1268 111 -0.09 25
IV.MC2.EHZ. 2021-11-28T05:42:43.81 0.1 negative manual P 348 0.116 116 0.15 99
IV.NRCA.HHZ. 2021-11-28T05:42:43.36 0.1 positive manual P 294 0.0872 129 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.8 0.0007315117 0.1408 AML other m 2021-11-28T05:42:45.96
IV.NRCA.HNN. ML:1.8 0.000777 0.08 AML other m 2021-11-28T05:42:45.55
IV.NRCA.HHN. ML:1.8 0.0007795 0.06 AML other m 2021-11-28T05:42:45.55
IV.NRCA.HNE. ML:1.8 0.00069288515 0.1184 AML other m 2021-11-28T05:42:45.96
IV.MMO1.EHE. ML:1.5 0.0003065 0.12 AML other m 2021-11-28T05:42:46.35
IV.MMO1.EHN. ML:1.2 0.0001351526 0.1216 AML other m 2021-11-28T05:42:46.37
IV.MMO1.HNE. ML:2.9 0.007598505 0.6496 AML other m 2021-11-28T05:42:44.23
IV.MMO1.HNN. ML:2.8 0.0058253225 0.6912 AML other m 2021-11-28T05:42:51.44
IV.MC2.EHE. ML:1.3 0.00020542585 0.1632 AML other m 2021-11-28T05:42:47.63
IV.MC2.EHN. ML:1.5 0.00030564615 0.24 AML other m 2021-11-28T05:42:47.28
IV.SMA1.EHE. ML:0.9 5.23743625E-5 44.8192 AML other m 2021-11-28T05:42:44.77
IV.SMA1.EHN. ML:0.9 5.110717E-5 0.9792 AML other m 2021-11-28T05:42:55.62
IV.FDMO.HHE. ML:0.7 2.511049E-5 0.1984 AML other m 2021-11-28T05:42:50.28
IV.FDMO.HHN. ML:0.9 4.046736E-5 0.1984 AML other m 2021-11-28T05:42:50.52
IV.MF5.EHE. ML:1.4 0.000121773025 2.0992 AML other m 2021-11-28T05:43:00.21
IV.MF5.EHN. ML:1.4 0.000128111225 2.32 AML other m 2021-11-28T05:42:59.15
IV.CSP1.EHE. ML:1.2 7.4467275E-5 44.16 AML other m 2021-11-28T05:42:45.89
IV.CSP1.EHN. ML:1.3 8.0048653E-5 0.5792 AML other m 2021-11-28T05:42:56.71
IV.CESI.HNE. ML:1.7 0.00018756155 0.8096 AML other m 2021-11-28T05:42:51.63
IV.CESI.HNN. ML:1.6 0.00015692145 0.5184 AML other m 2021-11-28T05:42:53.91
IV.CESI.HHE. ML:1 3.839236E-5 0.1024 AML other m 2021-11-28T05:42:52.29
IV.CESI.HHN. ML:1 4.6097265E-5 0.2208 AML other m 2021-11-28T05:42:52.27
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