Earthquake with magnitude of ML 1.1 on date 11-04-2021 and time 10:14:34 (UTC) in region 4 km NW Montereale (AQ)

A magnitude ML 1.1 earthquake occured in region: 4 km NW Montereale (AQ), on

  • 11-04-2021 10:14:34 (UTC)
  • 11-04-2021 12:14:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.56, 13.226 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
Montereale AQ 4 2581 2581
Capitignano AQ 8 665 3246
Cittareale RI 9 482 3728
Borbona RI 9 617 4345
Amatrice RI 9 2657 7002
Cagnano Amiterno AQ 11 1369 8371
Posta RI 11 694 9065
Campotosto AQ 12 542 9607
Barete AQ 13 737 10344
Pizzoli AQ 15 4326 14670
Accumoli RI 15 667 15337
Micigliano RI 18 127 15464
Antrodoco RI 20 2588 18052

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km NE of Tivoli (56533 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
81 Km W of Chieti (51815 inhabitants)
82 Km W of Pescara (121014 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
96 Km NE of Roma (2864731 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 1.1 2021-04-11
10:14:34
42.5597 13.2262 13 2021-04-11
10:20:11
Sala Sismica INGV-Roma 88999461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-11 10:14:34 ± 0.15
Latitude 42.5597 ± 0.0063
Longitude 13.2262 ± 0.0085
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 88999461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 626
Semi-minor axis of confidence ellipse (meter) 548
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 315
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.28598
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 88999461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-11 10:20:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.DRE.HHZ. 2021-04-11T10:16:24.61 3.0 undecidable manual Sg 12.53 0
IV.ZONE.HHZ. 2021-04-11T10:16:17.87 3.0 undecidable manual Sn -1.69 0
IV.CET2.HHZ. 2021-04-11T10:16:13.80 3.0 undecidable manual Sn 1.26 0
IV.TDS.HHZ. 2021-04-11T10:16:09.48 3.0 undecidable manual Sn -4.63 0
MN.CLTB.HHZ. 2021-04-11T10:16:01.82 3.0 undecidable manual Pg 14.09 0
IV.EUCT.HNZ. 2021-04-11T10:15:41.43 3.0 positive manual Pn 7.15 0
IV.CORL.HHZ. 2021-04-11T10:15:40.38 3.0 undecidable manual Pn -3.02 0
IV.SPS2.HHZ. 2021-04-11T10:15:37.62 3.0 undecidable manual Pn 3.19 0
IV.GIZZ.HHZ. 2021-04-11T10:15:35.31 3.0 positive manual Pn -1.95 0
IV.VOBA.EHZ. 2021-04-11T10:15:34.97 3.0 positive manual Pn 5.1 0
IV.SEI.HHZ. 2021-04-11T10:15:34.04 3.0 undecidable manual Sn 0.43 0
OT.OT14.EHZ. 2021-04-11T10:15:33.75 3.0 undecidable manual Sn -0.2 0
IV.TREG.EHZ. 2021-04-11T10:15:32.50 3.0 undecidable manual Pg 7.3 0
IV.NDIM.HHZ. 2021-04-11T10:15:27.94 3.0 undecidable manual Pg 8.73 0
IV.MCIV.CHZ. 2021-04-11T10:14:56.13 3.0 undecidable manual P 0.2 0
IV.TERO.HHZ. 2021-04-11T10:14:44.85 0.3 undecidable manual S 77 0.2851 96 -0.24 71
IV.NRCA.HHZ. 2021-04-11T10:14:44.80 0.3 undecidable manual S 343 0.286 96 -0.31 69
IV.MTRA.EHZ. 2021-04-11T10:14:43.35 0.3 undecidable manual S 32 0.2329 98 -0.22 71
IV.LNSS.HNZ. 2021-04-11T10:14:40.94 0.3 undecidable manual S 288 0.143 112 -0.04 75
IV.TERO.HHZ. 2021-04-11T10:14:40.27 0.6 undecidable manual P 77 0.2851 96 -0.2 47
IV.SMA1.EHZ. 2021-04-11T10:14:40.16 0.3 undecidable manual S 49 0.107 124 0.13 75
IV.NRCA.HHZ. 2021-04-11T10:14:40.48 0.6 negative manual P 343 0.286 96 0 49
IV.T1299.EHZ. 2021-04-11T10:14:39.47 0.3 undecidable manual S 29 0.0854 133 -0.05 76
IV.MTRA.EHZ. 2021-04-11T10:14:39.63 0.3 undecidable manual P 32 0.2329 98 0.03 75
IV.RM33.EHZ. 2021-04-11T10:14:38.63 0.1 undecidable manual S 190 0.0513 150 -0.27 98
IV.LNSS.HNZ. 2021-04-11T10:14:38.33 0.3 undecidable manual P 288 0.143 112 0.23 73
IV.SMA1.EHZ. 2021-04-11T10:14:37.93 0.1 positive manual P 49 0.107 124 0.38 95
IV.T1299.EHZ. 2021-04-11T10:14:37.48 0.3 undecidable manual P 29 0.0854 133 0.22 74
IV.RM33.EHZ. 2021-04-11T10:14:37.08 0.1 undecidable manual P 190 0.0513 150 0.18 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.2 0.000193 0.12 AML other m 2021-04-11T10:14:38.72
IV.RM33.EHE. ML:1.3 0.000273 0.34 AML other m 2021-04-11T10:14:38.96
IV.SMA1.EHN. ML:1.2 0.000174 0.48 AML other m 2021-04-11T10:14:40.46
IV.SMA1.EHE. ML:1.4 0.000241 0.48 AML other m 2021-04-11T10:14:40.52
IV.MTRA.EHE. ML:1 4.995E-5 1.54 AML other m 2021-04-11T10:14:44.09
IV.MTRA.EHN. ML:1 5.35E-5 0.44 AML other m 2021-04-11T10:14:44.57
IV.TERO.HHN. ML:0.9 3.41E-5 0.16 AML other m 2021-04-11T10:14:45.03
IV.TERO.HHE. ML:0.8 2.45E-5 0.18 AML other m 2021-04-11T10:14:45.02
IV.NRCA.HHE. ML:1.3 7.925E-5 0.74 AML other m 2021-04-11T10:14:45.17
IV.NRCA.HHN. ML:1 3.795E-5 0.46 AML other m 2021-04-11T10:14:49.40
IV.MCIV.CHN. ML:2.2 9.885E-5 0.4 AML other m 2021-04-11T10:15:00.79
IV.MCIV.CHE. ML:2 7.02E-5 0.54 AML other m 2021-04-11T10:15:41.89
IV.ZONE.HHE. ML:2.9 3.885E-5 0.86 AML other m 2021-04-11T10:16:21.86
IV.ZONE.HHN. ML:3 4.52E-5 0.58 AML other m 2021-04-11T10:16:32.32
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